Animals & Nature
The fastest, largest, longest-lived and strangest of the living world, ranked on measured biology.
38 lists in this topic.
Top 10 Largest Whitetail Deer by Boone and Crockett Score in North America
The ten highest-scoring typical whitetail bucks in the Boone and Crockett Club's records, led by Milo Hanson's 213-5/8-point Saskatchewan world record.
insectsTop 10 Biggest Spiders by Leg Span
The ten largest spiders in the world measured leg tip to leg tip, from a cave-dwelling huntsman the width of a ruler down to a dune spider the size of a saucer.
sea-lifeTop 10 Largest Whales by Maximum Recorded Length
The ten longest whale species on Earth, ranked by the maximum body length NOAA Fisheries reports for each.
animalsTop 10 Biggest Cats by Average Adult Body Mass in the World
Tigers hold the heaviest-cat record, but on typical adult male weight the lion edges ahead — and the top ten runs all the way down to the bobcat.
animalsTop 10 Fastest Land Animals by Top Speed in the World
From the cheetah's 112 km/h sprint to the coyote's 69 km/h chase, these are the ten fastest land animals on Earth by documented top speed.
animalsTop 10 Heaviest Animals Alive by Body Weight in the World
Whales take every slot on the podium — the ten heaviest living animals ranked by average adult body mass, from the 110-tonne blue whale down.
animalsTop 10 Largest Land Animals by Body Weight in the World
From the six-tonne African bush elephant down, the ten heaviest land animals alive today ranked by average adult body mass.
sea-lifeTop 10 Heaviest IGFA All-Tackle World Record Fish by Certified Weight of All Time
The ten heaviest fish ever certified as an IGFA all-tackle world record, ranked by weight.
animalsTop 10 Deadliest Snakes by Venom Potency (LD50)
The ten snakes with the most potent venom on Earth, ranked by subcutaneous LD50 — from the inland taipan's record-breaking neurotoxin to the tiger snake's complex cocktail.
animalsTop 10 Most Venomous Animals by Venom Potency (LD50)
The ten most venomous animals on Earth, ranked by subcutaneous LD50 — the most widely used scientific measure of venom potency against mice, from the tiny marine cone snail to Australia's inland taipan.
animalsTop 10 Largest Amphibians in the World by Maximum Length
The largest amphibians ever recorded, ranked by maximum body length — from the Chinese giant salamander to the Suriname toad.
animalsTop 10 Largest Reptiles in the World by Maximum Length
The largest reptiles ever measured, ranked by maximum body length — from the reticulated python to the leatherback sea turtle.
animalsTop 10 Longest-Living Vertebrates by Maximum Lifespan
The longest-lived vertebrate animals ranked by maximum verified lifespan — from the Greenland shark to the bowhead whale.
animalsTop 10 Largest Zoos in the World by Area
The ten largest zoos in the world, ranked by land area — from Ohio's sprawling 10,000-acre Wilds Safari Park to Canada's Toronto Zoo.
plantsTop 10 Largest Flowers by Bloom Diameter in the World
The ten largest individual flowers on Earth, ranked by their maximum observed bloom diameter, excluding composite flower heads and inflorescences.
animalsTop 10 Animals by Number of Neurons in the World
The ten animals with the highest total neuron counts in their whole nervous system, from the African elephant with 257 billion neurons to the lion with 4.7 billion — ranked by total brain neuron count.
insectsTop 10 Longest Insects by Body Length in the World
The ten longest insects in the world by body length, from the record-breaking Phryganistria stick insect to the giant Atlas moth — ranked by maximum body length in centimeters.
insectsTop 10 Heaviest Insects by Body Weight in the World
The ten heaviest insect species in the world, ranked by body weight — from the goliath beetle and the giant wētā to the atlas beetle and the titan beetle.
sea-lifeTop 10 Largest Bony Fish by Maximum Weight in the World
The ten heaviest bony fish species in the world, ranked by maximum recorded body weight — from the giant sunfish and ocean sunfish to the beluga sturgeon and Atlantic bluefin tuna.
animalsTop 10 Deepest-Diving Marine Animals by Maximum Dive Depth
The ten deepest-diving marine animals ranked by their maximum recorded dive depth, from the Cuvier's beaked whale down to the southern elephant seal.
animalsTop 10 Strongest Bite Forces in the Animal Kingdom
The ten animals with the most powerful bite forces ever measured, ranked by pounds per square inch (PSI), from the saltwater crocodile's bone-crushing jaws to the spotted hyena's industrial-strength skull.
animalsTop 10 Most Endangered Mammals by Wild Population
The vaquita porpoise, with fewer than 10 individuals remaining in the wild, is the world's most endangered mammal — a victim of illegal gillnet fishing in Mexico's Gulf of California.
animalsTop 10 Fastest Fish by Swimming Speed
The fastest fish in the ocean ranked by burst swimming speed, from the sailfish and black marlin to the torpedo-like wahoo and bonefish.
animalsTop 10 Heaviest Snakes in the World by Body Weight
The green anaconda can exceed 250 kilograms — the heaviest snake species on Earth, capable of subduing prey as large as caimans and deer.
plantsTop 10 Oldest Individual Trees by Verified Age in the World
A Great Basin bristlecone pine known as Methuselah has lived for 4,668 years — the oldest known living non-clonal tree on Earth.
breedsTop 10 Most Popular Cat Breeds by CFA Registrations
The ten most popular pedigreed cat breeds of 2026, ranked by annual registration data from the Cat Fanciers' Association (CFA), the world's oldest feline registry.
animalsTop 10 Longest Snakes by Maximum Length in the World
The reticulated python can reach over 7 metres — longer than a giraffe is tall — making it the world's longest snake species.
dinosaursTop 10 Heaviest Dinosaurs by Estimated Body Mass of All Time
The largest animals ever to walk the Earth were the long-necked sauropod dinosaurs of the Jurassic and Cretaceous, with the heaviest species rivaling the mass of a fleet of modern aircraft.
dinosaursTop 10 Largest Dinosaurs by Estimated Body Length
The ten longest dinosaurs that ever lived, ranked by estimated maximum body length — from the colossal Argentinosaurus down to Diplodocus.
animalsTop 10 Birds by Wingspan
The ten largest birds by maximum measured wingspan, from the soaring albatrosses of the Southern Ocean to the great bustards of the Eurasian steppe.
animalsTop 10 Largest Whale Species by Weight
The heaviest whale species ever recorded, ranked by documented maximum body weight.
animalsTop 10 Fastest Birds by Flight Speed
The 10 fastest birds on Earth ranked by maximum recorded airspeed, from the 242 mph peregrine falcon to the 81 mph red-breasted merganser.
animalsTop 10 Longest-Living Animals by Maximum Lifespan
The oldest single animals ever documented, from a 507-year-old clam to a century-plus tuatara, ranked by the maximum age reached by one individual.
sea-lifeTop 10 Largest Sharks by Maximum Length
The ten longest shark species on Earth, ranked by the largest individual each has ever had reliably measured.
breedsTop 10 Most Popular Dog Breeds by AKC Registrations in the United States
The French Bulldog holds the AKC's top spot for a fourth straight year as the most-registered breed in America.
plantsTop 10 Tallest Tree Species by Maximum Recorded Height
The ten tree species with the tallest individual ever reliably measured, from the 116-meter coast redwood down to the towering firs of the Pacific Northwest.
animalsTop 10 Fastest Animals
The ten fastest animals on Earth ranked by their maximum recorded speed in kilometres per hour, across air, land, and water.
animalsTop 10 Heaviest Animals
The ten heaviest animals alive today are all whales, led by the blue whale — the heaviest animal known to have ever existed.