What is a brain? Biology and Evolution
This is a mouse brain When did the first brains evolve? Flatworms were the first animals to evolve anything like a brain, but it's really just a thickened part of [...]
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05, 2017
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05, 2017
What does my liver do? Evolution and Digestion
Fish liver When did the first livers evolve? The earliest beginnings of what became the liver may have been relatives of segmented worms that lived about 600 million years ago. [...]
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05, 2017
Digestive System – Biology and Evolution
Digestive system: A hydra eating: the mouth is where all the tentacles come together,near the center of the picture.The hydra is eating the round bug in its stomach. Before digestive [...]
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05, 2017
Lungfish – Evolution of Fish
Evolution of fish: a lungfish Why did fish leave the water? About 400 million years ago, during the Devonian period, the Earth was going through an especially warm period. Some [...]
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05, 2017
History of Fish – Biology
History of fish: it looks like a severed tentacle but it's a lamprey. When did fish evolve? About 510 million years ago, in the Cambrian period, some of the worms [...]
