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Tag: "extremes" at biology news

Low level of extinction during ice age linked to adaptability

...in narrow latitudinal ranges became victims of the extremes in the annual minimum and maximum temperatures that were typical of the late Paleozoic. During that era, "seasonality" -- the difference between annual temperatures' highs and lows -- was amplified by the presence of glaciers. "I've suggested that t...

Life detection instrument passes key test on road to Mars

...for ages, and contending with dust and temperature extremes that left her either freezing or sweating, Skelley ran 340 tests that proved the instrument could unambiguously detect amino acids, the building blocks of proteins. More importantly, she and Mathies were able to detect the preference of Earth's amino...

Living with salt

...reak: it is able to grow in any salinity, from the extremes of the Dead Sea to nearly fresh water. The uniquely salt-tolerant Dunaliella, which is commercially grown as a source of natural beta carotene, has been investigated at the Weizmann Institute for over 30 years. Yet, the secrets of its exceptionally s...

Polynesia explorers created worldwide web of scientific knowledge

...iversity of Illinois at Urbana-Champaign. Braving extremes of polar cold and equatorial heat, the scientific voyages that sailed around Cape Horn between 1750 and 1850 systematically surveyed and studied the terra incognitas of Australia, Hawaii, New Zealand and Tahiti. Some accounts became bestsellers that ...

Copying nature could save us energy, study shows

...ifficulties, such as lifting a load or coping with extremes of heat, up to 70 per cent of man-made technologies manipulate energy, often increasing the amount used, in order to resolve the problem. However, new research which has compared how nature and man-made technologies overcome similar problems has sho...

Genes and genius: Researchers confirm association between gene and intelligence

...nts. Unfortunately, the numbers of people at those extremes were so small that the finding isn't statistically significant, but the point is we saw fairly substantial differences in our sample when we combined information across multiple regions of the gene." Dick says the next step is to look at the gene ...

How trees manage water in arid environments

.... "The semi-arid forest ecosystem adapts to the extremes in the annual cycle of water availability by its ability to remain turned on during the winter," Brown said. "Water stress, rather than temperature, is the primary control on the forest's behavior. The trees will remain significantly active regardles...

Paper challenges 1491 Amazonian population theories

...s a built landscape is gaining momentum. There are extremes at either ends, and the majority of people are in middle but there's a tendency of drifting toward the high end." For example, he says 1950s population estimates were 1 million, in the 70s that estimate drifted up to 4 million; and in the 1990s dr...

Genetic roots of bipolar disorder revealed by first genome-wide study of illness

...called manic-depressive illness. Symptoms include extremes in mood, from pronounced over-excitement and elation, often coupled with severe irritability, to depression. Children also may have the condition, usually in a more severe form than adults. "We're beginning to get a foothold on the genetics of thi...

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