After circling Earth for over 50 years, a 1,091-pound landing module is set to reenter the planet's atmosphere next month.

The first Earth Day celebrations took place 55 years ago. New York City marked the event with its first antipollution ...

The first Earth Day was celebrated in 1970, making this year's festivities the 55th annual festival. For the first Earth Day, ...

WASHINGTON — As communities across the DMV commemorate Earth Day, it’s worth remembering how this annual celebration began ...

Gaylord Nelson, the late U.S. senator and governor of Wisconsin, is considered the founder of Earth Day, which started in ...

On April 22, 1970, Philadelphia hosted a six-hour festival in Fairmount Park that drew 25,000 to 30,000 clean-air lovers. The ...

It was April 22, 1970, when kids across the United States poured out of schools carrying banners and hand-lettered signs ...

Earth Day is celebrated on April 22 each year, promoting environmental protection and awareness since 1970.

Minnesota has multiple success stories that produced a cleaner environment since the original Earth Day in 1970.

The holiday remains one of the largest secular observances in the world, used to spotlight ongoing threats including plastic ...