Maybe the first life on Earth was part of an 'RNA world.' Artur Plawgo/Science Photo Library via Getty Images How life on Earth started has puzzled scientists for a long time. And it still does.

IMAGE: A new study by CU-Boulder researchers indicates a thick organic haze shrouding Earth several billion years ago was similar to the one now hovering over Saturn’s largest moon, Titan. University ...

In an investigation to find out what sparked life on Earth, researchers have discovered that RNA formed through surprisingly ...

The study of early Earth microbial life and its associated organic matter provides crucial insights into the origins and evolution of life on our planet. Recent work has illuminated the remarkable ...

New experiments suggest RNA, life’s essential molecule, could have formed naturally on early Earth and even arrived from ...

The Earth and moon have been locked in a gravitational dance for billions of years. Each day, as the Earth turns, the moon tugs upon the oceans of the world, causing the rise and fall of tides. As a ...

Four billion years ago, our then stripling sun radiated only 70 to 75 percent as much energy as it does today. Other things on Earth being equal, with so little energy reaching the planet’s surface, ...