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Tag: "record" at biology news

Parts of the Caribbean and Central America are likely to have less summer rain

...lobal warming, and the observed global temperature record keeps supporting these predictions. However, there is still uncertainty about the amount of warming that will occur by the end of this century." ...

New analysis shows three human migrations out of Africa

...rough the area. " Templeton said that the fossil record indicates a significant change in brain size for modern humans at 700,000 years ago as well as the adaptation and expansion of a new stone tool culture first found in Africa and later at 700,000 years expanded throughout Eurasia. "By the time you're...

'Genetic network' guards against lethal DNA damage

...ut, the yeast cell dies and the microarray doesn't record that cell, Boeke noted. That means the two genes interact with each other, he said. "This strategy for finding interacting genes will open the door to an extraordinarily rich source of new data on DNA damage, repair, and human diseases," Boeke added...

Medieval diaries aid scientists ascertain increase in hot spots due to global warming

...hemical composition of the ice. They also used a record developed from diaries of people living in the Netherlands and Belgium over the past 750 years that revealed for example the years when the canals froze. ...

Relationship of brain and skull more than just packaging

...s apart, they would not be an exact fit." T scans record a three-dimensional image of the skull while MRIs ...sis for the physical change observed in the fossil record and propose hypotheses about the evolution of the genetic traits responsible for these changes. The ...

Scientists discover dozens of new species in 'Lost World' of western New Guinea

...ded what may be the largest rhododendron flower on record ?almost six inches across ?along with more than 20 new frogs and four new butterflies. Local Kwerba and Papasena people, customary landowners of the forest, welcomed the Conservation International team and served as guides and naturalists on the exp...

Paleontologists learn how not to become a fossil

...dies by determining what's missing from the fossil record and why. "Everyone talks about how imperfect the fossil record is, but not many people do anything about it," said David Jablonski, the William Kenan Jr. Professor...

Research tracks whales by listening to sounds

...s hydrophones that can be deployed in the ocean to record the unique clicks, pulses and calls of different whale species. Those efforts are leading to some surprising findings, including the discovery by a team of researchers of rare right whales swimming in the Gulf of Alaska. "There has been only one co...

Nanopore method could revolutionize genome sequencing

...irs of tiny gold electrodes. The electrodes would record the electrical current perpendicular to the DNA strand as the DNA passed through the pore. Because each DNA base is structurally and chemically different, each base creates its own distinct electronic signature. Previous attempts to sequence DNA us...

Record bonefish

... of Marine and Atmospheric Science. The fish was a record catch, representing the longest movement by a bone...in a linear distance of 186 miles." This distance record is more than double the previous one of 75 miles (Key Largo to Big Pine Key). It also suggests that...

Iraq's marshes show progress toward recovery

...s rivers has been greater than expected because of record snowpack melts, which has kept salinity levels low. The incoming water quality has been better than predicted, too, with toxin levels lower than had been feared. As a result, many native species have returned, including some rare bird species, althou...

Atmospheric ozone recovering in mid-latitudes, report shows

...onse with observations from other instruments that record variations in total-column ozone". To accurately attribute the ozone level changes to the Montreal Protocol, researchers had to account for long- and short-term natural fluctuations in ozone concentration, Cunnold noted. One such fluctuation is an 1...

Iron critical to ocean productivity, carbon uptake

...on-stressed populations because the satellite data record is too short. "But now we have the tools to determine that," he emphasized. The northern portion of the tropical Pacific is more nitrogen-stressed and doesn't have the "false greenness," according to Behrenfeld. The researchers are creating new mo...

UF scientists discover evolutionary origin of fins, limbs

... evolution of vertebrates," Cohn said. "The fossil record provides clear evidence that the first fins evolved along the midline. The sequence of evolutionary events leading to the origin of limbs has been known for some time, but only now are we deciphering how these events occurred at a molecular genetic l...

Creating a window on 'oceans in motion'

...rt information as an animal travels along, and can record water temperatures, salinity and even light conditions encountered at various depths and locations. Depending on the variety of tag used, the data is revealed when an animal is recaptured, surfaces (sending the archived data to a satellite) or passe...

Ancient global warming drove early primates' dispersal

...rimate; in North America, it appears in the fossil record around the same time as another primate, Cantius. Previously, scientists had come up with four ways to explain the geographic distribution pattern. The first is that primates originated in Africa and spread across Europe and Greenland to reach Nor...

Insect predation sheds light on food web recovery after the dinosaur extinction

...er mass extinction is a new pattern for the fossil record that researchers can now test for its generality. "Temporally and geographically isolated occurrences of severely unbalanced food webs may be a widespread feature of ecological recovery from mass extinction, resulting from instability, incumbency a...

Ecologists home in on how sperm whales find their prey

...ydrophone array. The researchers used the tags to record the sounds that sperm whales produce while foraging. As sperm whales descended from the surface, they emitted a regular series of "clicks". When the whales reach the bottom of their dive, these clicks are emitted more often, eventually merging togeth...

Septum keeps neurons in synch, can reduce epileptic seizures by 90 percent

...s weekly. The researchers then used electrodes to record individual neurons within the septum of the anesth...e awake and mobile, though it is more difficult to record the brain's discharges in freely moving animals. Then the research can move to humans. ...

Primates take weather into account when searching for fruits

...Uganda, the scientists obtained an almost complete record of their foraging decisions in relation to their preferred food, figs. The data showed that the monkeys were more likely to revisit fig trees (in which they had found fruit before) after a period of warm and sunny days than after a period of cold and...

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