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| Biology articles |
Memory in honeybees: what the right and left antenna tell the left and right brain
It is widely known that the right and left hemispheres of the brain perform different tasks. Lesions to the left hemisphere typically bring impairments in language production and comprehension, while lesions to the right hemisphere give rise to deficits in the visual-spatial perception, such as the inability to recognize familiar faces.
New evidence implicates humans in prehistoric animal extinctions
Research led by UK and Australian scientists sheds new light on the role that our ancestors played in the extinction of Australia's prehistoric animals. The study, published in the journal Proceedings of the National Academy of Sciences of the USA, provides the first evidence that Tasmania's giant kangaroos and marsupial 'rhinos' and 'leopards' were still roaming the island when humans first arrived. The findings suggest that the mass extinction of Tasmania's large prehistoric animals was the result of human hunting, and not climate change as previously believed.
Smells like bee's spirit
Bumblebees choose whether to search for food according to how stocked their nests are, say scientists from Queen Mary, University of London.
New research reveals why chili peppers are hot
Despite the popularity of spicy cuisine among Homo sapiens, the hotness in chili peppers has always been something of an evolutionary mystery.
Making 'good' fat from muscle and vice versa
A surprise discovery -- that calorie-burning brown fat can be produced experimentally from muscle precursor cells in mice -- raises the prospect of new ways to fight obesity and overweight, say scientists from Dana-Farber Cancer Institute.
Genetics reveals big fish that almost got away
Researchers from the University of Hawaii, the Wildlife Conservation Society, Smithsonian Tropical Research Institute, National Marine Fisheries Service and Projecto Meros do Brazil discovered a new species of fish-a grouper that reaches more than six feet in length and can weigh nearly 1,000 pounds. This newly discovered species can be found roaming the tropical reefs of the Eastern Pacific Ocean.
Tahitian vanilla originated in maya forests
The origin of the Tahitian vanilla orchid, whose cured fruit is the source of the rare and highly esteemed gourmet French Polynesian spice, has long eluded botanists. Known by the scientific name Vanilla tahitensis, Tahitian vanilla is found to exist only in cultivation; natural, wild populations of the orchid have never been encountered.
Elephant legs are much bendier than Shakespeare thought
Throughout history, elephants have been thought of as 'different'. Shakespeare, and even Aristotle, described them as walking on inflexible column-like legs. And this myth persists even today. Which made John Hutchinson from The Royal Veterinary College, London, want to find out more about elephants and the way they move. Are they really that different from other, more fleet-footed species? Are their legs as rigid and 'columnar' as people had thought?
New study by UC Santa Cruz anthropologist explores plausibility of bulbs and tubers in the diet of early human ancestors
It was a dirty job, but somebody had to do it. Anthropologist Nathaniel J. Dominy of the University of California, Santa Cruz, has advanced the investigation of the diet of early human ancestors by painstakingly measuring the mechanical properties of the underground parts of nearly 100 plant species across sub-Saharan Africa.
Biomarkers reveal our biological age
Not a day passes when we don't get a little bit older. However, the exact processes involved in human aging are still puzzling. Scientists working with Lenhard Rudolph and Hong Jiang from the Max Planck Research Group for Stem Cell Aging in Ulm have now identified a group of proteins that reveal the biological age of a person. These biomarkers could be used in medicine to adapt therapies for older people to their individual biological age.
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DNA barcodes: are they always accurate?
DNA barcoding is a movement to catalog all life on earth by a simple standardized genetic tag, similar to stores labeling products with unique barcodes. The effort promises foolproof food inspection, improved border security and better defenses against disease-causing insects, among many other applications.
Researchers locate geographic origins from DNA
One day soon, you may be able to pinpoint the geographic origins of your ancestors based on analysis of your DNA.
Whether brown or red, algae can produce plenty of green fuel
Having studied the physiology of algae for more than 30 years, Rose Ann Cattolico is convinced the plant life found in oceans and ponds can be a major source of environmentally friendly fuels for everything from cars and lawn mowers to jet airplanes.
Study says eyes evolved for x-ray vision
The advantage of using two eyes to see the world around us has long been associated solely with our capacity to see in 3-D. Now, a new study from a scientist at Rensselaer Polytechnic Institute has uncovered a truly eye-opening advantage to binocular vision: our ability to see through things.
Walk this way? Masculine motion seems to come at you, while females walk away
You can tell a lot about people from the way they move alone: their gender, age, and even their mood, earlier studies have shown. Now, researchers reporting in the September 9th issue of Current Biology, a Cell Press publication, have found that observers perceive masculine motion as coming toward them, while a characteristically feminine walk looks like it's headed the other way.
Scientists find 'redesigned hammer' that forged evolution of pregnancy in mammals
Yale researchers have shown that the origin and evolution of the placenta and uterus in mammals is associated with evolutionary changes in a single regulatory protein, according to a report in Proceedings of the National Academy of Sciences.
New ant species discovered in the Amazon likely represents oldest living lineage of ants
A new species of blind, subterranean, predatory ant discovered in the Amazon rainforest by University of Texas at Austin evolutionary biologist Christian Rabeling is likely a descendant of the very first ants to evolve.
From mice to men, evidence of evolutionary selection is found in 544 genes in analysis going back 80 million years
By comparing the genomes of humans and five other mammals, Cornell researchers have identified 544 genes that have been shaped by positive selection over millions of years of evolution.
Bee swarms follow high-speed 'streaker' bees to find a new nest
It's one of the hallmarks of spring: a swarm of bees on the move. But how a swarm locates a new nest site when less than 5% of the community know the way remains a mystery.
Digital zebrafish embryo provides the first complete developmental blueprint of a vertebrate
Researchers at the European Molecular Biology Laboratory (EMBL) have generated a digital zebrafish embryo - the first complete developmental blueprint of a vertebrate.
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| Quotes | Ive always wanted to be a scientist. That way, I could get a bunch of grants and do research into whether money can really buy happiness.
Kyannke.
Ive always wanted to be somebody, but I see now I should have been more specific.
Lily Tomlin |
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