Explore animal anatomy, body systems, senses, movement and the physical structures that help different species survive.
Are Greenland sharks blind? Discover what 2026 research reveals about their eyesight, eye parasites and adaptations to the dark Arctic Ocean.
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Octopuses have three hearts: two pump blood through the gills and one pumps oxygenated blood to the body. Squid and cuttlefish also have three hearts.
Which animals have short noses? Meet snub-nosed monkeys, short-snouted seahorses, shortnose fish, Pugs and animals that smell without an external nose.
Which animal has the biggest brain? Compare sperm whales, orcas, elephants and other animals with the largest brains, plus why brain size does not equal intelligence.
What animal has the most legs? Eumillipes persephone holds the record with 1,306. Compare millipedes, centipedes, woodlice, lobsters and more.
A “hexagonal dinosaur” is actually an axolotl, a Mexican aquatic salamander. Learn why it has six gill stalks, its color morphs, regeneration and wild status.