Cascadia Expeditions' Brett Gallagher and civil engineer Tyler Deboodt photographed in the entrance to Snow Dragon minutes before sunset in July 2013. Says McGregor, he wouldn't be surprised if the cave was destroyed by 2016. Once skylights form, air flows through the cave at an accelerated rate, which weakens the caves' structure and causes them to collapse.

Explorer Brent McGregor shares stunning photographs of glacier caves discovered within the Sandy Glacier on Oregon’s Mount Hood.

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Biologist Carin Bondar shares videos and books about animals getting down and dirty.

Cowboy at Paniolo Heritage Rodeo-Saturday, Mauna Loa, Hawaii.

So much has disappeared from the islands of my childhood. Will the paniolo be next?

Filmmaker Louie Schwartzberg looks at nature in fine detail, often documenting what’s unseen to the human eye. Take a look at still images and video clips that show the natural world in all its glory.

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That’s right. The cockroach. How watching Robert Full’s TED Talk effectively ruined the day of writer Kate Torgovnick May.

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Rachel Sussman is obsessed with very old things that are still alive. She has spent years researching and tracking down the world’s oldest organisms. Here, take a look at just some of her photographs, and watch her 2010 TED Talk on the topic.

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Gorgeous images of everyday natural wonders photographed all over the world, tagged #localnaturalwonders as part of our weekend Instagram Photo Challenge.