Billions of years ago, Earth was a dry, rocky planet with no oceans, no rivers, and no signs of water. So where did the vast ...

Research shows Earth’s magnetic field may have formed with a fully molten core - protecting the planet long before the inner ...

Of that first Earth Day, Nelson wrote in an article for the April 1980 issue of the EPA Journal, “It was on that day that Americans made it clear that they understood and were deeply concerned ...

The first Earth Day was held in 1970, making this year the 55th anniversary of the holiday. It has since then evolved into the "planet's largest civic event," according to the Earth Day website.

A history of the movement by EarthDay.org says the date of the first Earth Day — April 22, 1970 — was chosen because it fell on a weekday between spring break and final exams and the aim was ...

A history of the movement by EarthDay.org says the date of the first Earth Day — April 22, 1970 — was chosen because it fell on a weekday between spring break and final exams and the aim was ...