ScienceDaily: Top Science News |
- Humans, chimpanzees and monkeys share DNA but not gene regulatory mechanisms
- Saber-toothed cats and bear dogs: How they made cohabitation work
- Bacteria talk to each other and our cells in the same way, via molecules
- Telltale visible signs of aging may predict heart disease
- Star formation slumps to 1/30th of its peak
| Humans, chimpanzees and monkeys share DNA but not gene regulatory mechanisms Posted: 06 Nov 2012 05:11 PM PST Up to 40 percent of the differences in the expression or activity patterns of genes between humans, chimpanzees and rhesus monkeys can be explained by regulatory mechanisms that determine whether and how a gene's recipe for a protein is transcribed to the RNA molecule that carries the recipe instructions to the sites in cells where proteins are manufactured.  |
| Saber-toothed cats and bear dogs: How they made cohabitation work Posted: 06 Nov 2012 04:16 PM PST The fossilized fangs of saber-toothed cats hold clues to how the extinct mammals shared space and food with other large predators 9 million years ago.  |
| Bacteria talk to each other and our cells in the same way, via molecules Posted: 06 Nov 2012 08:42 AM PST Bacteria can talk to each other via molecules they themselves produce. The phenomenon is called quorum sensing, and is important when an infection propagates. Now, researchers are showing how bacteria control processes in human cells the same way.  |
| Telltale visible signs of aging may predict heart disease Posted: 06 Nov 2012 08:42 AM PST Visible signs of aging may predict your risk of heart disease. A receding hairline, baldness, earlobe crease and yellow fatty deposits on the eyelids were among signs of aging associated with an increased risk of heart disease.  |
| Star formation slumps to 1/30th of its peak Posted: 06 Nov 2012 08:41 AM PST While parts of the world experience economic hardship, astronomers have found an even bigger slump happening on a cosmic scale. In the largest ever study of its kind, astronomers have established that the rate of formation of new stars in the Universe is now only 1/30th of its peak and that this decline is only set to continue.  |
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