ScienceDaily: Strange Science News |
- Waterfall-climbing fish use same mechanism to climb waterfalls and eat algae
- Researchers seek longer battery life for electric locomotive
- A temperature below absolute zero: Atoms at negative absolute temperature are the hottest systems in the world
- Dinosaur shook tail feathers for mating show
| Waterfall-climbing fish use same mechanism to climb waterfalls and eat algae Posted: 04 Jan 2013 05:38 PM PST Going against the flow is always a challenge, but some waterfall-climbing fish have adapted to their extreme lifestyle by using the same set of muscles for both climbing and eating, according to new research. |
| Researchers seek longer battery life for electric locomotive Posted: 04 Jan 2013 11:36 AM PST Norfolk Southern Railway No. 999 is the first all-electric, battery-powered locomotive in the United States. But when one of the thousand lead-acid batteries that power it dies, the locomotive shuts down. To combat this problem, researchers are developing more cost-effective ways to prolong battery life. |
| Posted: 04 Jan 2013 11:35 AM PST On the absolute temperature scale, which is used by physicists and is also called the Kelvin scale, it is not possible to go below zero – at least not in the sense of getting colder than zero kelvin. According to the physical meaning of temperature, the temperature of a gas is determined by the chaotic movement of its particles – the colder the gas, the slower the particles. At zero kelvin (minus 273 degrees Celsius) the particles stop moving and all disorder disappears. Thus, nothing can be colder than absolute zero on the Kelvin scale. Physicists have now created an atomic gas in the laboratory that nonetheless has negative Kelvin values. These negative absolute temperatures have several apparently absurd consequences: although the atoms in the gas attract each other and give rise to a negative pressure, the gas does not collapse – a behavior that is also postulated for dark energy in cosmology. |
| Dinosaur shook tail feathers for mating show Posted: 04 Jan 2013 05:31 AM PST A researcher's examination of fossilized dinosaur tail bones has led to a breakthrough finding: some feathered dinosaurs used tail plumage to attract mates, much like modern-day peacocks and turkeys. |
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