Dr. Pol glides into the clinic and sports a newly replaced ankle and a new set of wheels.

The fleet learns that, without local knowhow, there’s no chance of conquering this challenging fishery.

Free solo climber Alex Honnold prepares to achieve his lifelong dream: scaling the 3,200-foot El Capitan in Yosemite National Park without a rope.

Relive the Apollo program from the disaster of Apollo 1 to the triumph of Apollo 8.

In the summers of 2017 and 2018, three beachgoers are attacked by sharks off the shores of Cape Cod, including the first shark fatality in Massachusetts in more than eighty years. Experts scramble to get to the bottom of this terrifying spike.