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A fossil discovered in Ethiopia suggests that humans' prehistoric relatives may have lived in the trees for a million years longer than was previously thought.

Mitochondrial network of an endothelial cell is shown in green Research projects evolve in a fortuitous manner, often guided by a convergence of novel observations, intuition, helpful colleagues and unique personal circumstances. It is precisely this constellation that prompted two cardiologists to study the mitochondrial networks in lung cancer cells.

How’s this for luck? Two tree species that scientists believed were extinct twice have been rediscovered in a remote area of Tanzania. According to a paper published in the Journal of East African Natural History , the two species were rediscovered in the remote, highly fragmented and rarely explored Namatimbili Ngarama Forest, 35 kilometers inland from the Indian Ocean.

Three of the U.S. military's newest recruits reported for duty this week at the Army Test and Evaluation Command . These troops are different from normal soldiers in several ways--for starters, each has six feet.

Colette Dziadul struggled for years to understand her daughter’s joint problems. Dana, who is now 14 years old, complained from toddlerhood that her knees and ankles hurt. The aches kept her up at night, made her wake her parents to ask for painkillers and forced her to sit out school sports.

By Lucy Hornby and Jim Bai BEIJING (Reuters) - China's Three Gorges Corp. [More]

LONDON (Reuters) - The collapse of an ice sheet in Antarctica up to 14,650 years ago might have caused sea levels to rise between 14 and 18 meters (46-60 feet), a study showed on Wednesday, data which could help make more accurate climate change predictions. The melting of polar ice could contribute to long-term sea level rise, threatening the lives of millions, scientists say.

It's a dangerous time of year for a chocoholic--chocolate rabbits and eggs abound. But a weakness for the cocoa bean might not be a bad thing: those who indulge more frequently seem to actually have lower body mass indexes, BMIs.

Compounds found in the herb thyme have antibiotic properties. Now scientists have demonstrated that thyme might have a future role in fighting acne. [More]

That six-year-old kid bent over a coloring book may become a 3D artist when he grows up--you never know. Now a new program can help him get a taste of that future, faster

F-1 engines (red cones) on the Apollo 8 first stage. Credit: NASA Jeff Bezos, Amazon.com CEO and one of the richest people in the world, has an abiding interest in the future of space exploration. His start-up Blue Origin is building suborbital launch vehicles and has received millions in NASA funding to develop next-generation spaceflight technologies.

Some 2.7 billion years ago in what is now Omdraaisvlei farm near Prieska, South Africa, a brief storm dropped mild rain on a new layer of ash laid down by a recent volcanic eruption (not unlike ash from the 2010 Eyjafjallaj

Image courtesy of iStockphoto/BrianAJackson More than half a million people died from cancer in the U.S. in 2011. We have many astounding advances in medicine to thank for that number not being higher

By Deborah Zabarenko WASHINGTON (Reuters) - One of the most interesting facets of a new United Nations climate change report is what's not in it: much mention of curbing the greenhouse gas emissions that trap heat in Earth's atmosphere and in turn can spur some natural disasters. "It is a change," said Christopher Field, a top editor of the 600-page document released on Wednesday. [More]

By David Fogarty and Deborah Zabarenko (Reuters) - A future on Earth of more extreme weather and rising seas will require better planning for natural disasters to save lives and limit deepening economic losses, the United Nations said on Wednesday in a major report on the effects of climate change. The U.N