ScienceDaily: Top Science News |
- Chili peppers for a healthy gut: Spicy chemical may inhibit gut tumors
- Why is the Sun's atmosphere so much hotter than its surface? Nanoflares
- Society bloomed with gentler personalities, more feminine faces: Technology boom 50,000 years ago correlated with less testosterone
- Nanostructured metal-oxide catalyst efficiently converts CO2 to methanol, a key commodity for chemicals and fuels
| Chili peppers for a healthy gut: Spicy chemical may inhibit gut tumors Posted: 01 Aug 2014 06:33 PM PDT Researchers report that dietary capsaicin – the active ingredient in chili peppers – produces chronic activation of a receptor on cells lining the intestines of mice, triggering a reaction that ultimately reduces the risk of colorectal tumors.       |
| Why is the Sun's atmosphere so much hotter than its surface? Nanoflares Posted: 01 Aug 2014 02:11 PM PDT Scientists have recently gathered some of the strongest evidence to date to explain what makes the sun's outer atmosphere so much hotter than its surface. The new observations of the small-scale extremely hot temperatures are consistent with only one current theory: something called nanoflares -- a constant peppering of impulsive bursts of heating, none of which can be individually detected -- provide the mysterious extra heat.  |
| Posted: 01 Aug 2014 02:11 PM PDT Scientists have shown that human skulls changed in ways that indicate a lowering of testosterone levels at around the same time that culture was blossoming. Heavy brows were out, rounder heads were in. Technological innovation, making art and rapid cultural exchange probably came at the same time that we developed a more cooperative temperament by dialing back aggression with lower testosterone levels.  |
| Posted: 31 Jul 2014 11:54 AM PDT Scientists have discovered a new catalytic system for converting carbon dioxide (CO2) to methanol-a key commodity used to create a wide range of industrial chemicals and fuels. With significantly higher activity than other catalysts now in use, the new system could make it easier to get normally unreactive CO2 to participate in these reactions.  |
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