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A giant sequoia located in Sequoia National Park in California, the General Sherman is 52,500 feet in volume and is more than 2,000 years old. The General Sherman giant sequoia is the largest known stem tree by volume on the planet. The trunk of the tree contains slightly more than 52,500 cubic feet (1,486.6 cubic meters) of material.

Discover interesting facts about Saturn, its rings and whether it could contain extraterrestrial life.

Earth Day is on Tuesday, April 22, this year. The annual observation is set aside to increase awareness around environmental issues like climate change, pollution, endangered species and other global concerns, along with encouraging citizens to take action in helping protect and preserve the planet.

Pluto was discovered in 1930 in Arizona, but in 2006 scientists decided to cut Pluto from the planetary line up. Here is why Pluto isn't a planet.

April 22 is traditionally known as Earth Day, the occasion where we pause as temporary travelers on our 'blue marble' to honor and respect our precious planetary home and its immeasurable beauty, allowing for greater appreciation of this distinctive world's bounty of resources.

Experts spotted a new, young planet with a strange behavior orbiting a dwarf star. It is 10 times bigger than the Earth and only three million years old.