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Person looks out over the Grand Canyon

What you can see on fee-free days at U.S. national parks this year

Gyoza is the voice of aliens for Halo.

Listen to this pug and you'll understand why the makers of 'Halo' hired him for voice-overs

A woman wears a face mask as she is waiting for a ferry on the Kowloon side of Hong Kong on Jan. 7, 2020.

What you need to know about that mysterious Chinese virus

A wide shot of the moon in all its colorful glory as captured from more than 100,000 photographs.

Our moon is more colorful than you think

congo river

Mysterious blind 'ghost fish' reveals Congo to be the deepest river in the world

BedMachine Antarctica CROP FOR SOCIAL

What lies beneath the Antarctic ice sheet?

Sagittarius A*, or Sgr A* lives at the center of our Milky Way, does our black hole have a friend?

Do black holes have friends?

Diego, the giant tortoise in the Darwin Research Center in Santa Cruz Island, Galapagos Islands, Ecuador

Diego the giant tortoise has dedicated himself to the survival of his species

TESS only detects transits from the larger star.

Teen interning at NASA discovers new planet

They were dropped in areas affected by bushfires.

Australian wildlife officials air-drop carrots, sweet potatoes to help struggling wallabies

Medicare for all!

What does 'Medicare for All' actually look like?

Man lectures group of businessmen outside circa 1970s

What is moral grandstanding and are you guilty of it?