These earliest creatures emerged more than 600 million years ago in Earth's ancient seas, leaving behind few clues. At the heart of the debate lies a simple but profound question—what came first ...

Anyone living on Earth between 720 million and 635 million years ago probably would've needed a jacket. Geologists have long suspected that Earth's temperature dropped dramatically during this ...

For over a century, scientists have wrestled with one of biology’s most fundamental mysteries: how the first animals evolved. These earliest creatures emerged more than 600 million years ago in ...

Sea anemones may hold the key to the ancient origins of body symmetry. A study from the University of Vienna shows they use a ...

Research data suggests humans may have nearly gone extinct almost 1 million years ago, but scientists aren't sure why.

Trees get most of the love, but diatoms, a group of photosynthetic microalgae, produce 20% of Earth's oxygen and are the ...

They are very tiny, but they are a key source of information when it comes to Earth's evolutionary history ... first appeared around 121 million years ago, the researchers have now been able ...

This story is the first article of a two-part Mongabay mini-series exploring possible climate futures. Read Part Two. The ...

Earth’s rotation is slowing — and that might be why we can breathe. Here’s how longer days helped oxygen rise and life take ...

Indian astronaut Shubhanshu Shukla will conduct the Voyager Tardigrades mission on the ISS, studying how these resilient ...