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Tag: "compass" at biology news

Migratory songbirds have a specialized night-vision brain area

...les in their visual system that translate magnetic compass information into visual patterns. Thus, , the rese...rocessing and integrating light-dependent magnetic compass information and star compass information; and thus may be responsible for the impressive navigationa...

Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals

...netic signals, birds employed a so-called chemical compass that worked by way of chemical reactions in specia...wed that this orientation involved the inclination compass and suggested that it is based on the type of "chemical compass" processes predicted by the Ritz mod...

Bacteria which sense the Earth's magnetic field

...ic field. The entire bacterium is oriented like a compass needle inside the magnetic field. Until now, it wa... allows the magnetosomes to behave together like a compass needle which orients the bacteria inside the relatively weak magnetic field of the Earth. But until ...

UCLA scientists strengthen case for life more than 3.8 billion years ago

...ks--it's not a big area--with a clipboard, maps, a compass and grid paper. We mapped it like an archeologist would map it," Manning said. "It became clear that these rocks that hosted life line up into two beautiful, coherent layers. They are not randomly distributed, as you might expect if the alternative i...

Light guides flight of migratory birds

...emonstrate that the birds calibrate their magnetic compass based on polarized light patterns at sunset and su...this geographic reference to calibrate their other compass systems. In other words, polarized light, the Sun and stars, and the geomagnetic field are all dir...

Researchers reveal mystery of bacterial magnetism

...netic field, the bacteria align like tiny swimming compass needles, a phenomenon call magnetotaxis. The research team is using genetic engineering to create a strain of the bacteria that become magnetic only when exposed to specific toxic chemicals, with the goal of using them as living chemical sensors....

UCSD researchers discover internal compass of immune cell

...on system that is an integral part of the internal compass the cells use to locate the source of chemoattract...source of chemoattractants. Once this internal compass has been activated, ATP is converted by the cells to adenosine, which in turn activates A3 adenosine...

How to steer a moving cell

...lls possess an innate ability to migrate, an inner compass that somehow senses the presence of chemokines. But in metastasis, the cell’s inner compass goes awry ?allowing cells to leave the primary tumor, crawl through tissues and enter blood vessels ...

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