The ice in the Arctic and Antarctica plays critical roles in maintaining life on Earth. They are the biggest reservoirs of freshwater on the planet and help steer ocean currents, which are major drivers of our weather. But if enough of that ice melts, sea levels could rise all over the world. That’s why a team of scientists is studying the Thwaites Glacier, nicknamed the "Doomsday Glacier," which is roughly the size of Florida and melting fast. PBS News Hour’s science correspondent Miles O’Brien

8K reactions · 1.3K shares | When the fast ice is just right, our captains undertake an exciting maneuver called garaging the ship. The ship slowly grinds to a halt, gently wedged into place in the ice. If conditions permit, guests then get to walk on a frozen sea! Explore Antarctica: expeditions.com/antarctica | Lindblad Expeditions | Facebook