ScienceDaily: Top Science News |
- The big male nose: Why men's noses are bigger than women's
- Bacteria recycle broken DNA: Modern bacteria can add DNA from creatures long-dead to its own
- Evidence found for granite on Mars: Red Planet more more geologically complex than thought
- World's smallest FM radio transmitter
- Long-term oral contraceptive users twice as likely to have serious eye disease
- Ancient, modern DNA tell story of first humans in the Americas
- Amber provides new insights into the evolution of Earth's atmosphere: Low oxygen levels for dinosaurs
- More than 600 ancient seals and amulets found in Turkey
| The big male nose: Why men's noses are bigger than women's Posted: 18 Nov 2013 01:00 PM PST Why are men's noses bigger than women's? The answer, according to a new study lies in our physiology. Men's noses are about 10 percent larger than female noses, on average, because males have more lean muscle mass, which requires more oxygen for muscle tissue growth and maintenance. It also explains why we have smaller noses than our ancestors. |
| Bacteria recycle broken DNA: Modern bacteria can add DNA from creatures long-dead to its own Posted: 18 Nov 2013 12:58 PM PST From a bacteria's perspective the environment is one big DNA waste yard. Researchers have now shown that bacteria can take up small as well as large pieces of old DNA from this scrapheap and include it in their own genome. This discovery may have major consequences – both in connection with resistance to antibiotics in hospitals and in our perception of the evolution of life itself. |
| Evidence found for granite on Mars: Red Planet more more geologically complex than thought Posted: 18 Nov 2013 06:15 AM PST Researchers now have stronger evidence of granite on Mars and a new theory for how the granite -- an igneous rock common on Earth -- could have formed there, according to a new study. The findings suggest a much more geologically complex Mars than previously believed. |
| World's smallest FM radio transmitter Posted: 18 Nov 2013 06:15 AM PST Scientists have taken advantage of graphene's special properties —- its mechanical strength and electrical conduction —- and created a nano-mechanical system that can create FM signals, in effect the world's smallest FM radio transmitter. |
| Long-term oral contraceptive users twice as likely to have serious eye disease Posted: 18 Nov 2013 06:14 AM PST Research has found that women who have taken oral contraceptives for three or more years are twice as likely to suffer from glaucoma, one of the leading causes of blindness which affects nearly 60 million worldwide. The researchers caution gynecologists and ophthalmologists to be aware of the fact that oral contraceptives might play a role in glaucomatous diseases, and inform patients to have their eyes screened for glaucoma if they also have other risk factors. |
| Ancient, modern DNA tell story of first humans in the Americas Posted: 18 Nov 2013 05:12 AM PST An anthropology professor has looked to DNA to tell the story of how ancient humans first came to the Americas and what happened to them once they were here. |
| Posted: 18 Nov 2013 05:10 AM PST Scientists have reconstructed the composition of the Earth's atmosphere of the last 220 million years by analyzing modern and fossil plant resins. The results suggest that atmospheric oxygen was considerably lower in the Earth's geological past than previously assumed. This new study questions some of the current theories about the evolution of climate and life, including the causes for the gigantism of dinosaurs. |
| More than 600 ancient seals and amulets found in Turkey Posted: 18 Nov 2013 05:10 AM PST Archaeologists have made an unusually large find in Turkey which has provided surprisingly vivid insights into the piety of the time. They discovered more than 600 stamp seals and cylinder seals at the sacred site of the storm and weather god Jupiter Dolichenus. |
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