A densely-packed school of fish parts for a passing free diver off the coast of Thailand in this mesmerizing scene captured by Your Shot photographer Tony Myshlyaev pic.twitter.com/dZ7WYIIOCB

"Because of their important role as prey, reductions in their abundance can have cascading effects on consumers throughout the food web." on.natgeo.com/37heAdM

Squirrels were released in America’s urban areas to “create pockets of rural peace and calm.” #SquirrelAppreciationDay on.natgeo.com/2TIcu2Q

The beautiful stone reliefs adorned a sophisticated canal system, and date to the reign of the mighty King Sargon II on.natgeo.com/2Rc4y8e

Happy #SquirrelAppreciationDay! These social animals like to use their snuggle time for warmth and mutual grooming pic.twitter.com/jR1RBRp6ub

Scientists were able to map the region around a distant black hole’s event horizon in unprecedented detail on.natgeo.com/37gujd8