The mysteries of Earth’s deep oceans ... like graceful alien creatures, further solidifying the ocean’s reputation as a world as alien as it is Earthly. Alien life might not be found in ...

The Triassic Period was a time of great change. Bookended by extinctions, this era saw huge shifts in the diversity and dominance of life on Earth, ushering in the ... These dinosaurs were small, ...

New research from Portland State University focused on identifying signs of life—biosignatures—in extreme environments here on Earth. Researchers investigated whether microbial active motion ...

Life may have appeared on Earth as far back as 4.2 billion years ago, suggesting it may have taken as little as 250 million years for life to arise once conditions were favorable.

The oldest is the Paleozoic Era, which means ‘ancient life’ and ... Era began with the Earth’s worst-ever extinction event. It is referred to as the Permian-Triassic extinction event because ...

The team found that the subsurface ocean on Titan – around 300 miles deep – could support "life-forms that consume organic material". The planet is described as being "Earth-like on the ...

When astronomers search for evidence of life beyond Earth, what signs are they seeking? Would clues be traced to microfossils trapped within ancient Martian rocks, swim in waters of an ocean world ...