A new weight-loss supplement has the potential to burn as many calories as a 20-minute walk, according to new research.

A natural material derived from crustacean shell and algae supports the growth of human embryonic stem cells.

Stem cell researchers exploring a new approach for the care of respiratory diseases report that an experimental treatment involving transplantable lung cells was associated with improved outcomes in tests on mice with acute lung injury. The lung cells were derived from human embryonic stem cells.

A 60-million-year-old relative of crocodiles was likely a food source for Titanoboa, the largest snake the world has ever known. Paleontologists found fossils of the new species of ancient crocodile in the Cerrejon Formation in northern Colombia. The site, one of the world's largest open-pit coal mines, also yielded skeletons of the giant, boa constrictor-like Titanoboa, which measured up to 45 feet long.

While a supernova can be seen, it can't be heard, as sound waves cannot travel through space. But what if the light waves emitted by the exploding star and other cosmological phenomena could be translated into sound? That's the idea behind a "Rhythms of the Universe," a musical project to "sonify" the universe by Grateful Dead percussionist and Grammy award-winning artist Mickey Hart that caught the attention of Nobel Prize-winning astrophysicist George Smoot of Lawrence Berkeley National Laboratory.

Trails found in rocks dating back 565 million years are thought to be the earliest evidence of animal locomotion ever found. The newly-discovered fossils, from rocks in Newfoundland in Canada, were analysed by an international team. They identified over 70 fossilised trails indicating that some ancient creatures moved, in a similar way to modern sea anemones, across the seafloors of the Ediacaran Period.

Pyrethroid pesticides were supposed to be a benign replacement for organophosphates used around the home, but a new study shows that these insecticides are showing up at toxic levels in storm runoff and even in the effluent from sewage treatment plants. While the levels are not high enough to harm fish, they may be enough to kill the mayfly, caddisfly and stonefly larvae upon which the fish feed.

Just as cooking helps people digest food, pretreating polycarbonate plastic -- source of a huge environmental headache because of its bisphenol A content -- may be the key to disposing of the waste in an eco-friendly way, scientists have found.

As chemotherapy and radiation treatments improve, children with cancer are living longer. The average five-year survival rate for a range of childhood cancers increased from 58 percent to 81 percent between 1975 and 2005, according to statistics from the National Cancer Institute . But although many of these children now survive cancer-free into their reproductive years, their fertility might not. In young women and girls, direct radiation and chemotherapy drugs can stop egg production by the ovaries--meaning that along with the tumor, hopes for pregnancy are often eradicated. [More]

At the turn of the millennium, the U.S. had some of the best broadband access in the world. It reached more homes, and at a lower price, than most every other industrial country. Ten years later the U.S. is a solid C-minus student, ranking slightly below average on nearly every metric.

Just how the U.S. lost its edge and how it plans to get it back are the issues before the Federal Communications Commission as it prepares to launch the most significant overhaul of network policy since the birth of the Web. As part of last year’s stimulus package, Congress provided $7.2 billion to expand broadband access to every American. It also required the FCC to outline a plan for how to make that happen. The outcome of the FCC’s deliberations, due February 17, could determine not just control over the broadband infrastructure but also the nature of the Internet itself.*

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