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87 Planet's atmospheric oxygen rose through glaciers, study shows
A 'Snowball Earth' event actually took place 100 million years earlier than previously projected, outlines a new report. www.sciencedaily.com/releas...
86 Genetic data show mainly men migrated from the Pontic steppe to Europe 5,000 years ago
A new study, looking at the sex-specifically inherited X chromosome of prehistoric human remains, shows that hardly any women took part in the extensive migration from the Pontic-Caspian Steppe approximately 5,000 years ago. The great migration that brought farming practices to Europe 4,000 years earlier, on the other hand, consisted of both women and men. The difference in sex bias suggests that different social and cultural processes drove the two migrations. www.sciencedaily.com/releas...
83 Drug treatment could combat hearing loss
A combination of drugs has been discovered that induces supporting cells in the ear to differentiate into hair cells, offering a potential new way to treat hearing loss. www.sciencedaily.com/releas...
83 Reasons for our left or right-handedness
It is not the brain that determines if people are right or left-handed, but the spinal cord, new research indicates. The biopsychologists have demonstrated that gene activity in the spinal cord is asymmetrical already in the womb. www.sciencedaily.com/releas...
81 Switched-on DNA: Sparking nano-electronic applications
DNA, the stuff of life, may very well also pack quite the jolt for engineers trying to advance the development of tiny, low-cost electronic devices. Much like flipping your light switch at home -- only on a scale 1,000 times smaller than a human hair -- a team has now developed the first controllable DNA switch to regulate the flow of electricity within a single, atomic-sized molecule. www.sciencedaily.com/releas...
80 Creative people have better-connected brains
Seemingly countless self-help books and seminars tell you to tap into the right side of your brain to stimulate creativity. But forget the "right-brain" myth -- a new study suggests it's how well the two brain hemispheres communicate that sets highly creative people apart. www.sciencedaily.com/releas...
79 Four-stroke engine cycle produces hydrogen from methane, captures carbon dioxide
When is an internal combustion engine not an internal combustion engine? When it's been transformed into a modular reforming reactor that could make hydrogen available to power fuel cells wherever there's a natural gas supply available. www.sciencedaily.com/releas...
71 Seven new species of night frogs from India including four miniature forms
Scientists from India have discovered seven new frog species belonging to the genus Nyctibatrachus, commonly known as Night Frogs. This find is a result of five years of extensive explorations in the Western Ghats global biodiversity hotspot in India. Four out of seven of the new species are miniature-sized frogs (12.2-15.4 mm), which can comfortably sit on a coin or a thumbnail. These are among the smallest known frogs in the world. www.sciencedaily.com/releas...
70 Radiocarbon dating and DNA show ancient Puebloan leadership in the maternal line
Discovering who was a leader, or even if leaders existed, from the ruins of archaeological sites is difficult, but now a team of archaeologists and biological anthropologists, using a powerful combination of radiocarbon dating and ancient DNA, have shown that a matrilineal dynasty likely ruled Pueblo Bonito in New Mexico for more than 300 years. www.sciencedaily.com/releas...
98 Dwarf star 200 light years away contains life's building blocks
Many scientists believe the Earth was initially dry and that water, carbon and nitrogen -- the building blocks for life -- likely came as a result of collisions with objects that began their lives in the cold outer reaches of our solar system. Today, scientists report discovery of the existence of just such an object -- one that once orbited a neighboring star. www.sciencedaily.com/releas...