Aerial of sapphire blue meltwater lake on Greenland ice sheet. —©Vanessa Berlowitz

Aerial of sapphire blue meltwater lake on Greenland ice sheet. —©Vanessa Berlowitz

Amazing! Polar Bear fight scene captured by Frozen Planet in Hudson Bay, Canada. -©Miles Barton 

Amazing! Polar Bear fight scene captured by Frozen Planet in Hudson Bay, Canada. -©Miles Barton 

Underwater life under the Antarctic ice. ©Hugh Miller

Underwater life under the Antarctic ice. ©Hugh Miller