Pufferfish

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Zoology

Some pufferfish species contain tetrodotoxin, a neurotoxin so potent that there's no known antidote. A tiny amount can be fatal to humans. elaborate share

Macaw

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Zoology

The word "beauty" comes from the Old French word "beauté," ultimately derived from the Latin word "bellus," meaning "beautiful" or "fine." elaborate share

Crinoid

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Zoology

Crinoids, despite looking like plants, are actually animals related to starfish and sea urchins. elaborate share

Bactrian Camel

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Zoology

Bactrian camels have two humps, unlike their single-humped Dromedary cousins. Each hump stores fat, but they aren't equally filled – the fat is distributed differently depending on the camel's nutritional status. elaborate share

Aye-aye

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Zoology

Aye-ayes have the largest relative eyes of any primate. elaborate share

Gorilla

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Zoology

Gorilla groups are led by a dominant silverback male, but the females often choose which male they mate with, making their social structure more complex than just a simple hierarchy. elaborate share