Even after half a lifetime studying polar bears in some of Earth's least hospitable climates, Andrew Derocher still gets nervous trying to tag a 1,000-pound bear on a frozen slab of ice in the open water.

"[The bears] are not worried about being out there, but it’s just not good enough for us," he says.

Photo by Andrew Derocher.

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When Richard Krishfield began his career fixing office equipment, he had no idea it would take him to the ends of the Earth.

Then, in 1986, Krishfield, who had spent years working on computers and electronics for businesses, was asked down to the Woods Hole Oceanographic Institute (WHOI) in Massachusetts to work on one of their instruments — a conductivity, temperature, and depth (or CTD) device that collects data from its seat on the ocean floor.

It wasn't the work Krishfield was used to, but it offered an intriguing promise of adventure.

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Icebergs! They're gorgeous, chilly, and might remind you of some of the people you went to high school with.

Or at least they might by the end of this article.

And because sea ice is breaking off more frequently, we're seeing more and more of these gorgeous chunks of icecap float away into the sea. With so many icebergs hitting the news lately, we thought we'd take a look at this recent class to see what their future holds.

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