May 7 - Derechos, Strange Crabs, UN Report

May 7 Derechos, Strange Crabs, UN Report by:

What you need to know about derechos Derechos are violent storm systems that can produce widespread wind damage across a large area. See images and read more. The strangest crab that has ever lived Meet Callichimaera perplexa, the platypus of crabs. It's a 95-million-year-old extinct species that, scientists say, will force us to rethink the definition of a crab. Read more. What we're reading   One million species at risk of extinction, report warns This week, in Paris, the United Nations released the first part of a new landmark report - the first comprehensive look in 15 years at the state of Earth's biodiversity - based on a review of 15,000 scientific and government sources and compiled by 145 experts from 50 countries. "The evidence is crystal clear: Nature is in trouble. Therefore we are in trouble," said Sandra Díaz, one of the co-chairs of the report. Read more from National Geographic, or go to the U.N.'s announcement page.

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Tonight … Young moon and Mars Look shortly after sunset! Just don't mistake the star Elnath for Mars. Elnath is the 2nd-brightest star in Taurus the Bull. Read more.

What you need to know about derechos The year 2012 saw multiple powerful derechos in the U.S. Here's the shelf cloud from the developing derecho in Chicago on June 29, 2012. Image via National Weather Service meteorologist Samuel Shea.   Submit your photo to EarthSky here! Did a friend forward EarthSkyNews to you? Click here to get your own subscription!

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