Animals seem to appear in the fossil record fairly suddenly, a little over half a billion years ago. Yet rocks can preserve ...

Animals experience the world in surprising ways humans cannot, a difference at the heart of this year’s World Animal Day theme.

We know there were animals during Earth’s chilliest era—but we still don't know what they look like. By Chris Baraniuk / Hakai Magazine Published Dec 23, 2022 6:00 PM EST This article was originally ...

The first animals may have appeared hundreds of millions of years earlier than their clearest fossils suggest. A new study ...

Scientists believe that at several times in Earth’s history the planet was covered by ice. Science History Images / Alamy Stock Photo This article is from Hakai Magazine, an online publication about ...

Even without body parts that allowed for movement, new research shows—for the first time—that some of Earth's earliest animals managed to be picky about where they lived. These creatures from the ...

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Lacking bones, brains, and even a complete gut, the body plans of simple animals like sea anemones appear to have little in common with humans and their vertebrate kin. Nevertheless, new research from ...

Humans are captivated by the idea of finding life elsewhere in the universe – and even more by the idea that life, if found, might resemble the complex, animal life here on Earth. One of the easiest ...