ScienceDaily: Most Popular News |
- First global geologic map of Jupiter's largest moon Ganymede details an icy world
- Genome of American Clovis skeleton mapped: Ancestor of most present-day Native American populations
- Four unknown galaxy clusters containing thousands of galaxies discovered 10 billion light years from Earth
- How chronic stress predisposes brain to mental disorders
- Urban bees using plastic to build hives
- Fossils abound: 'Epic' new Burgess Shale site in Canada's Kootenay National Park
| First global geologic map of Jupiter's largest moon Ganymede details an icy world Posted: 12 Feb 2014 11:45 AM PST More than 400 years after its discovery by Galileo, the largest moon in the solar system has finally claimed a spot on the map. A team of scientists has produced the first global geologic map of Ganymede, a Galilean moon of Jupiter. The map technically illustrates the varied geologic character of Ganymede's surface, and is the first complete global geologic map of an icy, outer-planet moon. |
| Genome of American Clovis skeleton mapped: Ancestor of most present-day Native American populations Posted: 12 Feb 2014 10:28 AM PST The Clovis people were not the first humans in America, but they represent the first humans with a wide expansion on the North American continent -- until the culture mysteriously disappeared only a few hundred years after its origin. Now genome mapping shows that some 80 percent of all present-day Native American populations on the two American continents are direct descendants of the Clovis boy's family. |
| Posted: 12 Feb 2014 05:24 AM PST Four unknown galaxy clusters each potentially containing thousands of individual galaxies have been discovered some 10 billion light years from Earth. An international team of astronomers used a new way of combining data from the two European Space Agency satellites, Planck and Herschel, to identify more distant galaxy clusters than has previously been possible. The researchers believe up to 2000 further clusters could be identified using this technique, helping to build a more detailed timeline of how clusters are formed. |
| How chronic stress predisposes brain to mental disorders Posted: 11 Feb 2014 12:35 PM PST Biologists have shown in rats that chronic stress makes stem cells in the brain produce more myelin-producing cells and fewer neurons, possibly affecting the speed of connections between cells as well as memory and learning. This could explain why stress leads to mental illness, such as PTSD, anxiety and mood disorders, later in life. |
| Urban bees using plastic to build hives Posted: 11 Feb 2014 07:33 AM PST Once the snow melts, bees will be back in business -- pollinating, making honey and keeping busy doing bee things. For at least two urban bee species, that means making nests out of plastic waste. A new study reveals that some bees use bits of plastic bags and plastic building materials to construct their nests. |
| Fossils abound: 'Epic' new Burgess Shale site in Canada's Kootenay National Park Posted: 11 Feb 2014 05:38 AM PST Yoho National Park's 505-million-year-old Burgess Shale – home to some of the planet's earliest animals, including a very primitive human relative – is one of the world's most important fossil sites. Now, more than a century after its discovery, a compelling sequel has been unearthed: 42 kilometers away in Kootenay National Park, a new Burgess Shale fossil bed has been located that appears to equal the importance of the original discovery, and may one day even surpass it. |
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