Pupil shapes vary widely across the animal kingdom, from the W-shaped pupils of cuttlefish to the bar-like pupils of goats.

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In the movie Hoppers, scientists “hop” human consciousness into animal-like robots to talk to other species. We asked the experts their thoughts on how conceivable the plot is.

By closely monitoring fish throughout their lives, researchers found that simple behaviors in midlife—like movement and sleep ...

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Inside the growing scientific quest to understand what creatures with the extraordinary ability to defy the ravages of time ...

Water is the essence of life; yet in the natural world, there are many examples of the opposite being true. There are many ...

Rachel Feltman: For Scientific American’s Science Quickly, I’m Rachel Feltman. In the animal kingdom lifespans can stretch from mere hours to entire centuries, but that’s just the start. Some ...

Scientists in Australia have identified the oldest known fossil footprints of a reptile-like animal, dated to around 350 million years ago. The discovery suggests that after the first animals emerged ...