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Tag: "landmarks" at biology news

New Clues Add 40,000 Years to Age of Human Species

...y matching features such as hills from the film to landmarks in the field, together with a hand drawn map from the late Paul Abell and photographs by Karl Butzer, both members of the 1967 expedition, the researchers were able to precisely locate the original fossil outcrops. The scientists collected hundreds ...

Research on antibiotics receives historical recognition

...e world's largest scientific society, sponsors the landmarks program. Beginning in the 1930s, Selman Waksman, Ph.D., and his students began the search for antibiotics produced from actinomycetes, microbes in the soil that are related to bacteria and fungi. The culmination was the isolation of streptomycin in ...

Chickadees can help humans get their bearings

...s been observed in every species tested, even when landmarks alone could be used, suggesting that animals are p...ngular features of their environment and following landmarks instead. Although able to learn geometry when guiding themselves to food in lab experiments, the bir...

Biologists determine genetic blueprint of social amoeba

...everal hundred genes on those chromosomes based on landmarks that had been discovered over the years, then created a set of 5,000 large DNA clones, each about 200,000 nucleotide bases long, that proved useful for other researchers in assembling the genetic sequences of Dictyostelium's genome. Another UCSD biol...

Study suggests that publicly available genome data may contain small but significant errors

...nome in much the same way as a mapmaker can locate landmarks at the correct coordinates by consulting a three-d... a geographical map. The distance between pairs of landmarks can be used to assemble physical maps, as an aid to sequence assembly, or as an independent method f...

First demonstration of 'teaching' in non-human animals

...e the follower frequently pauses to look round for landmarks so that it can learn the route. Only when the follower has done this does it tap on the hind legs and abdomen of the leader to let it know that the tandem run can proceed. The researchers' detailed analysis of the movements of tandem leaders and ta...

Relationship of brain and skull more than just packaging

... on the skull and brain. "We found that the brain landmarks people often use were highly variable and had the biggest errors in reproducibility," says Richtsmeier. "We eventually chose brain locations that were easier to identify reliably such as the most posterior point or the centroid of small neural struct...

Chemical signaling helps regulate sensory map formation in the brain

...nt in concentration gradients, serve as positional landmarks within the brain. Theses landmarks are then recognized by growth cones at the tip of axons ?the projections that grow out from the reti...

How ants find their way

...the food site will navigate using a combination of landmarks and memories of the whole landscape. The scientists found the ants even used different sets of landmark memories depending on whether they were on their way to food, or whether they were full and heading back to the nest. Ants store many memories and...

Army research mission focused on autism

...erfectly normal baby. He hit all his developmental landmarks but after his first birthday he seemed to be sick all of the time, with infection after infection. He stopped eating and was no longer happy and playful. By 17 months he had stopped talking, interacting, or even looking at us anymore; he was in his o...

New technique will produce a better chromosome map

...roteins that bind to specific DNA sequences. These landmarks will help them tease out the relationship of the sequence to the physical structure. The new approach will allow scientists to answer fundamental questions about chromosome structure, Novikov said. Such questions have relevance across species. ...

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