The plant kingdom has a rich natural history all its own.
A thin layer of bright green slime at the bottom of an Antarctic lake is giving scientists a glimpse at life on Earth 2.4 billion years ago.
Earth's magnetic field, which protects the planet from harmful blasts of solar radiation, is much older than thought.
The Earth's innermost section is different from what scientists expected. Continue reading →
Nitrogen may have arrived on Earth in ancient meteorites after the planet had already formed.
Sometime in the distant future, the Earth once again will have a massive supercontinent, and today's beachfront real estate will be a lot less desirable.
Telltale signs of life have been discovered in rocks that were once 12 miles (20 kilometers) below the surface — some of the deepest chemical evidence for life ever found.
Four-billion-year-old sample suggests modern-day Iceland is our best bet for an example of how Earth's continents first formed.
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