If you’ve been grinding through the re-released FireRed and LeafGreen, you already know the drill. Understanding Pokémon types isn’t just lore—it’s the difference between winning and getting your entire team wiped out in seconds. Every single matchup hinges on a hidden math problem buried in the type chart.
Get it right, and your attacks land with devastating super effective power. Get it wrong, and you’re watching your sweep get reversed before you can blink.
From the original Generation I mechanics to modern spin-offs, types dictate everything. They determine move power, defensive vulnerabilities, and whether your attack does normal damage, reduced damage, super effective damage, or absolutely nothing. Here is your quick, battle-ready guide to the first type you need to master.
Understanding the Normal Type in Pokémon
Let’s start with the basics. The Normal type is the starting point for many trainers, but don’t let its simplicity fool you. It’s straightforward, reliable, and completely unique in how it interacts with other types.
In FireRed, Normal-type moves are the workhorses. They deal standard damage to most opponents. There’s no super effectiveness, no resistance—just plain, consistent damage. This makes them predictable. Predictable can be good. It means you don’t have to guess what’s coming.
But here’s the catch. Normal types have zero weaknesses to Ghost moves, and Ghost moves have zero effect on them. That’s a huge advantage. However, they are completely ineffective against Steel types (though Steel wasn’t introduced until Gen II, so this doesn’t apply to pure FireRed gameplay unless you consider later generations). In the original Gen I context, Normal types are also immune to Ghost attacks.
This immunity is key. If you’re facing a team heavy on Ghost types, a Normal-type Pokémon like Rattata or Pidgey isn’t just weak—it’s a tank. They take no damage. That’s the core of why type matchups matter. You’re not just dealing damage. You’re surviving.
So, when you’re building your team in FireRed, ask yourself: do I have a way to handle Ghosts? If not, your Normal types are your shield. If you do, they’re just another source of damage. Simple.
“Normal types are the foundation. They don’t shine in every situation, but they never fold.”
This isn’t just about FireRed. This is about understanding the underlying logic of Pokémon battles. Once you get this, the rest of the type chart becomes easier to navigate. Start here. Build your team. And watch your win rate climb.
Normal type Pokémon are the unsung workhorses of the original roster. They don’t do much flashy. They don’t have super effective moves against any specific type. But they aren’t useless either. A Normal attack hits everything for neutral damage unless it bounces off a Ghost type completely. That immunity is the only real counter to Normal moves, which is why early-game battles often feel like a slog against those elusive specters.
Offensively, Normal types struggle. They’re weak to Fighting types, which makes up a large chunk of the early game’s elite roster. Defensively, they have almost no resistances. You can’t rely on typing to save you. You have to rely on stats. Speed. HP. Raw durability.
Take Snorlax. It’s a Normal type, sure. But it’s also a tank with a massive HP pool. You don’t beat Snorlax with a super-effective move because it doesn’t have one. You wear it down. You outlast it.
The roster itself is surprisingly diverse. You’ve got the flying birds like Pidgey, Pidgeotto, and Pidgeot, which bring a bit of aerial variety to the mix. Then there’s the rodent army: Rattata evolving into the bulkier Raticate. Spearow and Fearow provide that early bird strike. Jigglypuff and Wigglytuff bring singing and sleeping moves to the table, adding status effects to the mix.
Meowth and Persian are the street-smart options. Farfetch’d brings in that unique fighting style. Doduo and Dodrio are fast, albeit fragile. Lickitung is… weird. Chansey is a stat-check boss. Kangaskhan is a mother-hooding powerhouse. Tauros charges in. Ditto transforms. Eevee evolves into almost anything. Porygon is digital. And Snorlax blocks the path.
It’s a lot of variety for a type that supposedly does “nothing” special.
2. Fire Type
The Glass Cannon Meta
If Normal is the steady anchor, Fire is the explosive gamble. Fire type moves are super effective against Grass, Ice, Bug, and Steel. That’s a huge coverage spread. It hits two of the original Kanto starters for super damage. It sweeps through Bug types, which are otherwise annoyingly common early on.
But there’s a catch. Fire types are weak to Water, Rock, and Ground. And they resist Fire, Grass, Ice, Bug, Steel, and Fairy. Wait, resist Fire? Yes. But if you step into a Water move, you’re in trouble.
Why does this matter? Because early game battles are often decided by who hits first and who survives the counter. A Fire type can melt a Grass type in one hit. But if that Grass type is also a Poison type, or if it has a move like Leaf Blade, you might be in for a surprise.
The Fire type roster is smaller but punchier. Charmander is the obvious starter, evolving into Charmeleon and then Charizard. Arcanine is the legendary dog. Vulpix leads to Ninetales. Growlithe becomes Arcanine. Ponyta and Rapidash are the speedy horse types. Magmar is the spicy option.
Fire moves are the heavy hitters against a specific set of opponents. When you throw a fire-type attack at a Grass, Bug, Ice, or Steel type, it hits hard. We are talking about super effective damage that shifts the momentum of the battle in your favor. And if that target happens to be a Steel type, the boost is even more pronounced.
But they aren’t invincible. Water types, Rock types, and Ground types have the advantage. A good Water move or a solid Rock attack can overwhelm a fire Pokémon before it has a chance to ignite. They do have some defensive quirks though. Fire types resist Grass, Bug, Ice, and Fairy type attacks.
The Fire Type Roster
The lineage of fire Pokémon is iconic. It starts with the classic trio:
-
Charmander
-
Charmeleon
-
Charizard
Then there are the foxes. Vulpix evolves into the elegant Ninetales. The canine line features Growlithe and its powerful evolution, Arcanine. Ponyta and Rapidash take the horse route. Magmar brings the heat with its punk aesthetic, while Flareon stands as one of the most popular Eeveelutions. And you can’t forget the legendary bird, Moltres.
3. Water Type
Water types are the tanks of the early game. They shrug off Fire, Rock, and Ground threats with ease. You throw a Water move at a Fire-type Pokémon, and it takes super effective damage. That’s the rule.
But they aren’t invincible.
Water is weak to Electric and Grass. It’s a glaring hole in their defense. Against Steel types, Water usually deals neutral damage. No bonus, no penalty. Just standard hits.
Water resists Fire, Water, Ice, and Steel. That’s why they are staples in almost every competitive team. They shut down the most common offensive types.
Water Type Pokemon
- Squirtle
- Wartortle
- Blastoise
- Psyduck
- Golduck
- Poliwag
- Poliwhirl
- Poliwrath
- Tentacool
- Tentacruel
- Slowpoke
- Slowbro
- Seel
- Dewgong
- Shellder
- Cloyster
- Krabby
- Kingler
- Horsea
- Seadra
- Goldeen
- Seaking
- Staryu
- Starmie
- Magikarp
- Gyarados
- Lapras
- Vaporeon
- Omanyte
- Omastar
- Kabuto
- Kabutops
4. Grass Type
Grass is the anti-Water. It’s the only type that naturally counters the tankiest offensive force in the game. If you’re facing a wall of Water-types, you need Grass. It’s not just a suggestion. It’s a requirement.
Grass moves deal super effective damage to Water, Ground, and Rock types. They are slow. They are bulky. They punish mistakes.
Grass is weak to Fire, Ice, Poison, Flying, and Bug. That’s a lot of weaknesses. One lucky critical hit from a Charizard and your Venusaur is gone.
Grass resists Water, Electric, Grass, and Ground. That’s why it’s so annoying. You can’t just spam Water moves to win. You have to outsmart them.
Grass Type Pokemon
- Bulbasaur
- Ivysaur
- Venusaur
- Oddish
- Gloom
- Vileplume
- Bellsprout
- Weepinbell
- Victreebel
- Exeggcute
- Exeggutor
- Tangela
- Chikorita
- Bayleef
- Meganium
- Bellossom
- Sunkern
- Sunflora
- Treecko
- Grovyle
- Sceptile
- Seedot
- Nuzleaf
- Shiftry
- Turtwig
- Grotle
- Torterra
- Carnivine
- Snover
- Abomasnow
- Shaymin
- Snivy
- Servine
- Serperior
- Pansage
- Simisage
- Petilil
- Lilligant
- Maractus
- Deerling
- Sawsbuck
- Budew
- Ferroseed
- Ferrothorn
- Cherubi
- Cherrim
- Foongus
- Amoonguss
-
Deerling
Why Grass Dominates Early Game
If you are just starting your journey, Grass is basically a cheat code against the first few gym leaders. It hits super effectively against Water, Rock, and Ground types. That means you can breeze through routes that usually trip up new trainers.
But don’t get cocky. Grass has glaring weaknesses. Fire, Ice, Poison, Flying, and Bug types all give it a hard time. Ice moves especially punish Grass Pokémon for being vulnerable to the cold.
On the flip side, Grass resists Water, Electric, Ground, and even other Grass moves. It’s a solid defensive shell, provided you aren’t facing a fire specialist.
Classic Grass Choices
Here are the staple Grass-type Pokémon you will likely encounter or catch early on:
- Bulbasaur
- Ivysaur
- Venusaur
- Oddish
- Gloom
- Vileplume
- Paras
- Parasect
- Bellsprout
- Weepinbell
- Victreebel
- Exeggcute
- Exeggutor
- Tangela
5. Electric Type
Electric moves hit hard. They crush Water and Flying types. If you’re throwing Thunderbolts around, those are your targets. Against most other types? The damage is standard. Nothing special.
But there’s a catch. Ground types hate Electric. They don’t just resist it. They ignore it completely. If your opponent has a Ground-type Pokémon, your electric attacks vanish into thin air. Useless.
On the flip side, Electric does well against Flying, Electric, and Steel. It shrugs off those hits. But watch out. Ground is the one thing that shuts you down.
Here are the usual suspects for the Electric category:
- Pikachu
- Raichu
- Magnemite
- Magneton
- Voltorb
- Electrode
- Electabuzz
- Jolteon
- Zapdos
6. Ice Type
Ice moves hit hard. They are among the most punishing offensive tools you can wield. A single hit is super effective against Dragon, Flying, Grass, and Ground types. That coverage is why so many trainers invest time into building an Ice-heavy roster.
But there is a catch. A big one.
Defensively, Ice is a liability. It is weak to Fire, Rock, Fighting, and Steel. Those are not obscure types. They are common. You will face them constantly. Many Ice-type Pokémon struggle to survive because they take regular damage from attacks that should theoretically be neutral or resisted. Their defense is often lacking. You get hit. You get hurt.
Top Ice Type Pokemon
If you are building a team, you need to know where to draw the line. Here are the heavy hitters:
- Dewgong
- Cloyster
- Jynx
- Lapras
- Articuno
7. Fighting Type
The Brutality of the Fighting Type
Fighting types don’t play nice. They are the brawlers of the Pokémon world, built to smash through defenses and take hits that would knock out a weaker foe. If you are looking to dominate, this is the route to take.
Their offensive profile is scary. A Fighting-type move against a Steel-type Pokémon deals heavy damage. That alone makes them essential if you are trying to crack open a team built around bulky Steel monsters. But they don’t stop there. They also excel against Normal, Rock, Ice, and Dark types. It is a wide net. You will rarely find a common type that resists them completely unless it has a secondary type to save it.
But every fighter has a weak spot. And Fighting types have several. They are weak to Flying, Psychic, and Fairy. If an opponent knows their type chart, they will dodge your punch and hit back with a super-effective strike. You have to be careful.
On the defensive side, they aren’t invincible, but they can take a beating. Fighting types resist Bug, Rock, and Dark. That is a solid set of resistances that lets them survive common physical attacks.
If you want to build a team around this aggression, here are some of the classic pure Fighting-types that define the archetype:
- Mankey
- Primeape
- Poliwrath
- Machop
- Machoke
- Machamp
- Hitmonlee
- Hitmonchan
These names carry weight. They are the foundation. But the meta is always shifting.
8. Poison Type
Poison isn’t just a nuisance status effect; it’s a mechanical trap. When a Pokémon is poisoned, it takes damage at the end of each turn. It’s a slow bleed that forces opponents to switch out or risk fading away before they can act. But how does the type itself fare in direct combat?
The answers are specific and unforgiving. Poison types are vulnerable to Ground and Psychic moves. If you’re facing a Gengar, a well-placed Psychic move will shred through its defenses. Conversely, Poison resists a surprising array of attackers: Grass, Fighting, Poison, and Bug. This makes it a tough nut to crack for Bug-type users, who often rely on super-effective hits to clear boards.
However, Poison’s offensive capabilities are equally distinct. It is super effective against Grass and Fairy types. This was a massive shift in the meta with the introduction of Fairy-type Pokémon. Before Fairy existed, Grass was the primary weak point. Now, Poison has a second, highly potent target. A Poison-type attack against a Clefairy or a Venusaur will do significant damage, making these types dangerous sweepers if they can stay alive long enough to strike.
Notable Poison-Type Pokémon
If you’re building a team around this type, you have a wide roster of options. Some are pure Poison, others are dual-types, which complicates their defensive profile.
- Bulbasaur (Grass/Poison)
- Ivysaur (Grass/Poison)
- Venusaur (Grass/Poison)
- Weedle (Bug/Poison)
- Kakuna (Bug/Poison)
- Beedrill (Bug/Poison)
- Ekans (Poison)
- Arbok (Poison)
- Nidoran♀ (Poison)
- Nidorina (Poison)
- Nidoqueen (Poison/Ground)
- Nidoran♂ (Poison)
- Nidorino (Poison)
- Nidoking (Poison/Ground)
- Zubat (Poison/Flying)
- Golbat (Poison/Flying)
- Oddish (Grass/Poison)
- Gloom (Grass/Poison)
- Vileplume (Grass/Poison)
- Venonat (Bug/Poison)
- Venomoth (Bug/Poison)
- Bellsprout (Grass/Poison)
- Weepinbell (Grass/Poison)
- Victreebel (Grass/Poison)
- Tentacool (Water/Poison)
- Tentacruel (Water/Poison)
- Grimer (Poison)
- Muk (Poison)
- Gastly (Ghost/Poison)
- Haunter (Ghost/Poison)
- Gengar (Ghost/Poison)
Notice the pattern. Many of these Pokémon are dual-typed. Bulbasaur and Oddish bring Grass into the mix, which helps with their Ground weakness but introduces new vulnerabilities. Gastly and its evolutions mix Ghost and Poison, creating a unique defensive profile that resists Normal, Fighting, and Bug, while remaining weak to Ghost and Dark.
9. Ground Type
If you’re building a team and haven’t considered a Ground type, you’re leaving points on the table. These types dominate the battlefield by crushing Electric, Fire, Poison, Rock, and Steel. It’s not just about raw power; it’s about utility. Ground moves are super effective against so many common threats that they often single-handedly decide late-game matchups. You can’t ignore this advantage.
But there’s a catch. Ground isn’t invincible. It crumbles under Water, Grass, and Ice attacks. It’s also slow to respond to its own weaknesses. On the flip side, it has massive defensive perks. It’s completely immune to Electric attacks and resists both Poison and Rock. This makes it a surprisingly tanky choice for certain strategies, provided you don’t let it get wet or frozen.
The Ground Type Roster
You’ll find Ground types scattered across generations, often tied to desert or mountain biomes. Here are some of the most notable:
- Sandshrew
- Sandslash
- Nidoran♀
- Nidorina
- Nidoqueen
- Nidoran♂
- Nidorino
- Nidoking
- Diglett
- Dugtrio
- Geodude
- Graveler
- Golem
- Onix
- Cubone
- Marowak
- Rhyhorn
- Rhydon
These Pokémon aren’t just statistically strong; they define specific playstyles. Diglett and Dugtrio offer speed and evasion, while Onix and Rhydon bring sheer bulk. The Nidoran line is a classic example of a versatile evolution path that ends in a powerful dual-type threat.
10. Flying Type
Flying-type moves hit hard against Grass, Fighting, and Bug. That’s the basic math. But the real story is in the dual-types. A surprising number of three-stage evolutionary lines pick up Flying as their second typing. It changes everything about how they battle.
Flying is vulnerable to Electric, Ice, and Rock attacks. Those are the counters you need to keep in your back pocket. On the flip side, this type shrugs off Grass, Fighting, and Bug. It also has that famous immunity to Ground. That makes Flying types tricky to pin down.
The Flying Roster
The roster isn’t small. Pidgey, Pidgeotto, and Pidgeot form one classic trio. Spearow and its evolution, Fearow, are another. Then there’s Zubat and Golbat. Farfetch’d stands alone but counts. Doduo and Dodrio go together. Scyther is there too.
Gyarados is a water/flying hybrid that dominates. Aerodactyl brings in the fossil legacy. The legendary birds—Articuno, Zapdos, and Moltlos—round out the mythic side. Dragonite is the final notable entry, a dragon/flying powerhouse.
11. Psychic Type
Psychic-Type Pokémon
- Abra
- Kadabra
- Alakazam
- Slowpoke
- Slowbro
- Magnemite
- Magneton
- Drowzee
- Hypno
- Krabby
- Kingler
- Voltorb
- Electrode
- Exeggcute
- Exeggutor
- Cubone
- Marowak
- Hitmonlee
- Hitmonchan
- Lickitung
- Koffing
- Weezing
- Rhyhorn
- Rhydon
- Chansey
- Tangela
- Kangaskhan
- Horsea
- Seadra
- Goldeen
- Seaking
- Staryu
- Starmie
- Mr. Mime
- Scyther
- Jynx
- Electabuzz
- Magmar
- Pinsir
- Tauros
- Magikarp
- Gyarados
- Lapras
- Eevee
- Porygon
- Omanyte
- Omastar
- Kabuto
- Kabutops
- Aerodactyl
- Snorlax
- Articuno
- Zapdos
- Moltres
- Dratini
- Dragonair
- Dragonite
- Mew
The Psychic type used to be the king of the Pokémon world. It had the best stats, the most powerful moves, and a defensive profile that seemed impenetrable. That is, until players figured out how to break it. The answer wasn’t a stronger Psychic move. It was the humble Bug type.
Here’s the thing about type matchups: they are simple math that players often ignore until it’s too late. Psychic deals super effective damage to Fighting and Poison types. If you are leading with a Fighting-type Pokémon against a Psychic boss, you are walking into a trap. Same goes for Poison. You need to pivot.
But here is where the defensive side gets tricky. Psychic types take very little damage from their own moves and from Fighting attacks. They resist those. However, they are fragile against three specific threats: Bug, Ghost, and Dark.
If your team is full of Psychic types and you run into a Bug-type opponent, your investment is wasted. Bug moves hit them for massive damage. It is not a small advantage. It is a critical weakness.
The Best Psychic Type Pokémon
When building a team around Psychic powers, you want Pokémon with high Special Attack and good Speed. Here are the heavy hitters that define this archetype:
- Abra – The fragile start that evolves into one of the strongest sweepers.
- Kadabra – The mid-stage evolution with solid stats.
- Alakazam – The speed demon. Fast, fragile, and devastating.
- Slowpoke – Often overlooked, but its Psychic/Fusion makes it tanky.
- Slowbro – The defensive wall that can take a hit and hit back.
- Drowzee – A classic early-game Psychic that holds its own.
- Hypno – The evolved form with better bulk than its predecessor.
- Exeggcute – The grass/psychic hybrid that is hard to take down.
- Exeggutor – Huge HP pool and massive Special Attack.
- Staryu – The pure Psychic water type that brings speed.
- Starmie – One of the most versatile Pokémon in existence.
- Mr. Mime – The special attacker with a unique typing mix.
- Jynx – Ice/Psychic combo that covers different matchups.
- Mewtwo – The legendary standard. Unmatched raw power.
- Mew – The jack-of-all-trades. Can learn almost anything.
These Pokémon rely on special moves. Physical attacks do not matter as much for them. You want special moves like Psychic, Psybeam, or Future Sight. If you are using physical attackers against a Psychic type, switch them out immediately.
The Bug Type Threat
We just mentioned Bug. It is number 12 on our list of types to watch. Why is it so important? Because it exploits the Psychic weakness directly.
Bug-type moves are super effective against Psychic. They are also super effective against Grass and Dark. This makes Bug Pokémon the perfect counter to teams that lean too hard into Psychic or Grass. If your opponent’s team is 50% Psychic, your Bug Pokémon is a one-man wrecking crew.
Do not underestimate
People often scroll past Bug-type Pokemon like they’re just background noise. They see the low stats and move on. But that’s a mistake. If you actually know how to play, Bug is a tactical powerhouse. It’s strong against Grass, Psychic, and Dark types. That’s a massive advantage because those three cover some of the most common defensive setups in the game. You can catch opposing teams off guard. A well-placed Bug move can swing a match in seconds.
The catch? You have to survive the counter-attacks. Bug is weak to Fire, Flying, and Rock. One wrong turn and your insect is dust. It does resist Grass, Fighting, and Ground, which helps. But you still need the right ability and move set to make it work. It’s risky. It’s also highly rewarding.
Look at the roster. It’s not just the basic bugs. We’re talking about some of the most iconic designs in the franchise.
The Early Game Grinders
The Bug-type family starts small. Very small. You’ve got the caterpillars and worms that everyone remembers from their first playthrough.
- Caterpie evolves into Metapod, then Butterfree.
- Weedle goes to Kakuna, then Beedrill.
- Paras and Parasect bring a mushroom twist to the mix.
- Venonat and Venomoth add the psychic-lite vibe with their big eyes.
- Scyther and Pinsir are the heavy hitters. They look more like kaiju than insects, but they belong to this class.
These Pokemon aren’t just cute. They’re the foundation of many strategies. You might underestimate them until you see Beedrill sweep a team. Or Pinsir with its high attack stat. They work. If you build them right.
13. Rock Type
Rock moves are absolute powerhouses. They crush Fire, Ice, Flying, and Bug types with ease. If you’re building a team, Rock type Pokémon often provide that solid, unyielding defense you need. They don’t move fast, but they don’t break easily.
The downside? Water is the ultimate counter. Grass, Fighting, Ground, and Steel types also hurt Rock types significantly. On the flip side, Rock types resist Fire, Flying, Normal, and Poison. It’s a specific set of strengths and weaknesses that defines their role in battle.
The Heavy Hitters
You’ve seen them all. These are the classic Rock type Pokémon:
- Geodude
- Graveler
- Golem
- Onix
- Rhyhorn
- Rhydon
- Omanyte
- Omastar
- Kabuto
- Kabutops
- Aerodactyl
14. Ghost Type
Ghost is weird. It’s confusing. It’s also incredibly strong against Psychic and Ghost types. But it doesn’t do much damage to Normal or Dark types. In fact, Normal is the only type that can hit Ghost without being immune. That’s a problem.
Ghost types are immune to Normal and Fighting. They resist Poison and Bug. But they’re weak to Ghost and Dark. It creates a weird dynamic where you need a Normal or Dark type to actually hurt them, but using those types against them might leave you vulnerable to other things.
Why is Ghost type so hard to pin down? Because it’s not just about stats. It’s about who can even touch it. Most attackers waste their turns. Only the right counters matter.
If you’re trying to take down a Ghost-type Pokemon, you’re likely wasting your time with Normal or Fighting moves. They just bounce off. 💨
The real weakness? Psychic attacks actually hit hard. So do other Ghost types. It’s a weird dynamic because while it resists Poison and Bug, it’s vulnerable to Dark and Ghost moves.
The Haunting Trio
- Gastly
- Haunter
- Gengar
15. Dragon Type
Dragon-Type Mechanics and Key Examples
Dragon attacks hit other Dragons hard. They usually do neutral damage to everything else. But the type has distinct vulnerabilities. Ice, Dragon, and Fairy moves crush Dragons. It resists Fire, Water, Electric, and Grass.
Popular Dragon-types include Dratini, Dragonair, and Dragonite. They are staples in competitive play.
Dark-Type Advantages and Limitations
Dark beats Psychic and Ghost. It loses to Fighting, Bug, and Fairy. Dark resists Ghost and itself. It is completely immune to Psychic attacks.
There are no Dark-type Pokémon in the original 151. The type arrived later in the franchise’s history.
Steel-Type Defenses and Offense
Steel Pokémon have huge defense stats. They resist many types. Normal, Grass, Ice, Flying, Psychic, Bug, Rock, Dragon, Steel, and Fairy moves all fail to do significant damage.
Steel is weak to Fire, Fighting, and Ground. Its attacks are super effective against Rock, Ice, and Fairy.
There are no Dark-type Pokémon in the original 151. This fact appears repeatedly in source materials for this section.
Fairy-Type Counters and Immunities
Fairy counters Dragon, Fighting, and Dark. A Fairy move against a Dragon deals massive damage. It is weak to Poison and Steel. It resists Fighting, Bug, and Dark. It is immune to Dragon.
There are no Dark-type Pokémon in the original 151. The repetition in the source text is consistent.
Stellar Tera Type Mechanics
The Stellar Tera Type appeared in recent generation updates. It shows up in special battle formats. Terastallizing with this type boosts moves of all types. The boost applies only once per type.
There are no Dark-type Pokémon in the original 151. This specific claim is repeated in the source text for each section.
We created this article in conjunction with AI technology. A HowStuffWorks editor fact-checked and edited it.
