Our weekly compilation of science news for the week of October 11, 2009.
Arctic land and seas account for up to 25 percent of world’s carbon sink: Ecologists estimate that Arctic lands and oceans are responsible for up to 25 percent of the global net sink of atmospheric carbon dioxide.
Chimpanzees help on request, but not voluntarily: The evolution of altruism has long puzzled researchers and has mainly been explained previously from ultimate perspectives—I will help you now because I expect there to be some long-term benefit to me.To read the study:
Yamamoto, S., Humle, T., & Tanaka, M. (2009). Chimpanzees Help Each Other upon Request PLoS ONE, 4 (10) DOI: 10.1371/journal.pone.0007416
Hubble captures galaxy smash-up: A recent NASA/ESA Hubble Space Telescope image captures the result of a pair of spiral galaxies smashing together at breakneck speeds.
Kew seed bank has 10% of all plants – and counting: Kew Millennium Seed Bank Partnership has reached its initial target of collecting 10 per cent of the world’s known wild plant species.
Liver cells grown from patients’ skin cells: Scientists at The Medical College of Wisconsin in Milwaukee have successfully produced liver cells from patients’ skin cells opening the possibility of treating a wide range of diseases that affect liver function.
New strategy for mending broken hearts?: By mimicking the way embryonic stem cells develop into heart muscle in a lab, Duke University bioengineers believe they have taken an important first step toward growing a living “heart patch” to repair heart tissue damaged by disease.
Scientists find new flying reptile: Scientists said that the discovery fills in the large evolutionary gap between two different groups of pterosaurs: primitive long-tailed forms and their descendants, advanced short-tailed pterosaurs, some of which reached gigantic size.
Scientists uncover trampled dinosaur bones in Utah: Paleontologists say a vast collection of broken dinosaur bones unearthed in southeast Utah were smashed underfoot by other dinosaurs shortly after they died.