Discover how scientists found and dated the oldest rocks on the planet, and why studying them can help explain how life on ...

Scientists say they’ve confirmed Earth’s inner core has been slowing down. Here’s what it could mean — and why the topic has been the subject of fierce debate.

Happy Earth Day!For the 55th year, the world is using the day to celebrate Mother Nature and the wonderful planet we live on. "Earth Day really is a symbol of the environmental movement," Sarah ...

Soviet spacecraft plunging back to Earth 53 years after launching 03:37. Just weeks ago, scientists warned that a "city killer" asteroid had a small chance of hitting Earth. While that prediction ...

Earth Day occurs annually on April, 22. It began in 1970 and celebrates the environmental diversity of Earth and highlights ways of protecting it.