Don't stand so close to me: A new view on how species coexist
...sps within a computer model, and then watched what happened over very long periods of time - up to 100,000 generations. Parasitoid wasps, insects that kill other insects by laying eggs in them, account for a fifth of all known multi-celled species. Their 200,000 species places them approximately next to land ......now-extinct human species to Homo sapiens may have happened during mating, so Reed plans a study of pubic or c...ieve the population bottleneck seen in human genes happened because only a small group of human ancestors left Africa in the second wave 150,000 to 50,000 years...How roots control plant shoots
...all and abnormally shaped. Van Norman noticed that happened just as new roots started to grow from the bottom of the shoots. So Van Norman kept cutting off the roots each time they started to regenerate. The plants produced normal leaves, indicating the mutant roots were sending a chemical signal to stop le...Rutgers-led research offers new clues in the genetic mysteries of maize
.... "It looks like significant evolutionary change happened in a relatively short time," said Messing. "Because they are immobile, plants have to adapt to changes more rapidly than animals that can move to escape environmental impacts. Plants are continually faced with a variety of seasonal challenges and ass...UT Southwestern researchers uncover process for sugar-induced fat formation
... to liver cells from normal mice to determine what happened to genes associated with fat formation. The researchers grew the cells in a high-glucose solution to mimic the high-carbohydrate diet the mice were fed in the previous study. They found that unlike normal liver cells, liver cells from mice lac...Globetrotting pollutants turn up on Toronto street
...of Chemical Engineering and Applied Chemistry. "We happened to know when that forest fire was happening in Quebec and we realized that this mixture of different particles that we found in downtown Toronto is a signature for a forest fire." With the dust particles from the Sahara, the researchers recognized sa...Latest buzz in research: Intoxicated honey bees may clue scientists into drunken human behavior
...eriod on their backs, unable to stand. This effect happened early on, within the first 10 minutes of the observation period. They also spent almost no time grooming or flying. "These bees had lost postural control," Mustard said. "They couldn't coordinate their legs well enough to flip themselves back over ag...Study: Inadequate physical activity worsens as teenagers become adults
...g adulthood since few scientists have studied what happened to activity levels over that part of the life cycle. The work involved analyzing extensive data gathered from 13,030 teens in 1994-95 and again in 2001 through Waves I and III of the National Longitudinal Study of Adolescent Health. Begun at UN...Four new vertebrate fossil finds in Ischigualasto, Argentina
... 6. "We are documenting with greater detail what happened at the end of the Triassic," added Alcober. "It seems that, in the southern part of the prehistoric supercontinent Pangea anyway, the Triassic-Jurassic extinction was not as catastrophic as apparently documented in the north." The new dinosaur was a...The blotchier the face, the better the wasp
...ed and the hierarchy flipped something that never happened in wasp fights with unaltered wasps. Even if the dominance hierarchy was maintained, the unaltered wasp was much more likely to continue to harass the altered wasp. "Changing the face interfered with their establishment of a dominance hierarchy," sai...University of Texas at Austin researchers identify drug-tolerance mechanism in flies
...llege party," Atkinson said. The reverse behavior happened during recovery from the drug. The flies began stumbling around and then climbing the test-tube walls within minutes. The flies that had previously been exposed to BA recovered much more rapidly than their drug-free counterparts. The researchers have...Computer analysis shows scientists could reconstruct the genome of the mammalian common ancestor
...ved as an example of the evolutionary changes that happened in all these different mammalian lineages. [Blanchette] took all of the information we learned from detailed examination of this one region and incorporated it into a software program that is able to simulate mammalian evolution at the molecular leve...What have scientists learned since Mount St. Helens erupted?
...1980 eruption occurred on a spring morning. Had it happened in late summer and at night, more plants and animals would have perished. "Events such as the season, and even the time of day, strongly influence survivorship and recovery," Crisafulli says. "If it had been late summer, there would not have been lat......ronmental Science and Health. "We were wrong. What happened is that the plants absorbed the mercury from the air." According to Nevada researchers, once a tree's leaves contain mercury, those leaves eventually fall off, decay and mercury goes back into the soil, air and, ultimately, water. According to Mae G...Immune system contributes to evolution of a new fluorescent protein
...nd that the mPlum mutation was made on a gene that happened to land at an immunoglobulin locus. "That makes us think that there is something special about the immunoglobulin locus that makes it a little better than other sites, and further efforts will aim at targeting such loci better in introducing genes," ...Shedding feathers early may enhance sex appeal, new songbird study shows
... colours in any given year may be affected by what happened to them in the previous breeding season. "That's exciting because 'cost of reproduction' is a general, organism-wide problem of many species, not just birds." The other member of the research team from Queen's is geology professor Kurt Kyser, direct...The death of a very special chimpanzee
...utate and change. They can also die, which is what happened to a few cell lines created during the publicly funded Human Genome Project. The anonymity of the donors meant new lines could not be established, and the lack of back-up cell lines caused trouble when unexpected patterns appeared in the DNA sequence...Queen's discovery sheds new light on ancient temperatures
...he planet," says James. "If we understand what has happened in the past and how the earth has responded and recovered, it will give us some idea of how the world will respond to some of the things that are happening to it now." The researchers discovered ikaite at several different levels in what were believe...Unusual reproductive behavior of odd ants surprises scientists
...om all ants in a given colony. But that's not what happened here." It didn't matter that the laboratory experiments mimicked the founding of a new colony, which depends heavily on workers and only needs one queen: when a queen and male of the same lineage mated, they produced eggs that would give rise to many......d way at available compounds to see if any of them happened to have anti-aging activity." The researchers grew the roundworm C. elegans in the presence of the 19 drugs and found that an anticonvulsant, ethosuximide, extended the worms' lives from an average of 17 days to an average of 20 days. Further tests o...