Gray wolves maintain the food chain in winter
...lly elk or moose) once sated, leaving much-coveted leftovers for ravens, eagles, coyotes, bears, and other scavengers. Altogether, their modeling studies show that shorter winters without wolves will create intermittent food supplies that no longer track the needs of local scavengers. With or without wolves, l...'Jumping genes' contribute to the uniqueness of individual brains
...ents were thought to be intracellular parasites or leftovers from our distant evolutionary past. It has been known for a long time that L1 elements are active in testis and ovaries, which explains how they potentially play a role in evolution by passing on new insertions to future generations. "But nobody has......yonal differentiation processes, or even dispersed leftovers from previous evolutionary stages. Indeed, these cells are still showing plasticity which is a characteristic of stem cells, but no direct physiological function can be deduced from it....MicroRNA may have fail-safe role in limb development
...ients, microRNAs were considered to be "junk" DNA, leftovers from millions of years of evolution. More recently, this genetic material is suspected to be part of an intricate mechanism that helps repress about one-third of our 25,000 genes. It has been linked to diabetes, hepatitis C, leukemia, lymphoma and br...Max Planck researchers win part of Descartes Research Prize 2005
...y are compact -- only 20 kilometres in diameter -- leftovers of supernova explosions. Nonetheless they have a mass 1.4 times that of our sun, and a very strong magnetic field. They emit beams of radiation from two regions above their magnetic poles, using a mechanism that is not completely understood. When a p...'Hidden-hero' microbes in soil, water may help naturally clean toxic sites
..., technetium, nitrate and other potentially lethal leftovers at the Oak Ridge site, the process should work to mitigate contamination at more than 7,000 other sites nationwide -- and do so more economically and effectively than most conventional methods. "The stakes are high and the impact potentially huge,"......icks swans stop by during migration to feed on the leftovers of sugarbeets that remain after the farmers harvest. The ornithologists were interested in why some fields were used more intensively than others, while all fields seem to offer similar amounts of food right from the start. They wondered: "In case fo...