ScienceDaily: Top Environment News |
- Cells eat themselves into shape
- Deep Earth heat surprise: New findings on how heat is conducted in the deep lower mantle
- Why an ice age occurs every 100,000 years: Climate and feedback effects explained
| Cells eat themselves into shape Posted: 09 Aug 2013 08:48 AM PDT To quickly smooth out their surface, cells in the fruit fly embryo 'suck in' long tubes of membrane in a specialized type of endocytosis, scientists have found. The study could help explain how the cells on your skin become different from those that line your stomach or intestine.  |
| Deep Earth heat surprise: New findings on how heat is conducted in the deep lower mantle Posted: 09 Aug 2013 05:41 AM PDT Researchers have for the first time experimentally mimicked the pressure conditions of Earths' deep mantle to measure thermal conductivity using a new measurement technique on the mantle material magnesium oxide. They found that heat transfer is lower than other predictions, with total heat flow across the Earth of about 10.4 terawatts, about 60 percent of the power used today by civilization. They also found that conductivity has less dependence on pressure conditions than predicted.  |
| Why an ice age occurs every 100,000 years: Climate and feedback effects explained Posted: 07 Aug 2013 10:41 AM PDT Science has struggled to explain fully why an ice age occurs every 100,000 years. As researchers now demonstrate based on a computer simulation, not only do variations in insolation play a key role, but also the mutual influence of glaciated continents and climate.  |
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