NASA Baffled by Holes in the Arctic’s Sea Ice

Written by Rafi Letzter

NASA Doesn't Know What Poked These Holes in the Arctic's Sea Ice

Credit: John Sonntag/Operation IceBridge/NASA

NASA scientists flying over the Arctic earlier this month spotted strange shapes out the window, but they aren’t sure what caused them.

A strange formation appears in Arctic ice at 69.71° North and 138.22° West, about 50 miles northwest of Canada’s Mackenzie River Delta.

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Move Over Double Helix: New Form of DNA Discovered

Written by Peter Hess

When we learn about human genetics in high school biology class, one of the most basic things we learn about is the DNA double helix, the twisting ladder-shaped structure that holds our genetic code.

But scientists have long suspected there’s another type of DNA that looks quite different from the famous Watson-Crick model. They theorized that it’s knot-shaped, though they’d never observed it in a living cell … until now.

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Arctic Much Warmer 2,000 Years Ago

Written by Kenneth Richard

During the Roman Warm Period ~2,000 years ago, sea levels were significantly higher than they are now.  Modern coastlines are 2 miles down from where they were during the Roman invasion of Britain in 43 AD, strongly implying that surface air temperatures were much warmer ~2,000 years ago compared to today.

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Critics: Nutrition Science is Mostly Junk

Written by www.bmj.com

 Drs. Mozaffarian and Forouhi raise a crucial question in their article, “Dietary guidelines and health—is nutrition science up to the task?”[1] That task, of course, is whether our nutrition recommendations have effectively prevented the major chronic diseases of our time.

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