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Radioactive Fish Give Off Bad Vibes
Oct 31, 2006
Radioactive Fish Give Off Bad Vibes
Fish exposed to dangerous radiation send out chemical signals to alert their pals so they can then turn up their defenses, scientists in Canada report. These results might help regulators identify radiation leaks from nuclear power plants. Since 1921, scientists have known that cells and animals exposed to radiation emit...
Dolphin May Have 'Remains' of Legs
Oct 31, 2006
Dolphin May Have 'Remains' of Legs
TOKYO (AP) -- Japanese researchers said Sunday that a bottlenose dolphin captured last month has an extra set of fins that could be the remains of hind legs, a discovery that may provide further evidence that ocean-dwelling mammals once lived on land. Fishermen captured the four-finned dolphin alive off the...
Surprise! Your Cousin's a Sea Urchin
Oct 31, 2006
Surprise! Your Cousin's a Sea Urchin
Meet your new evolutionary cousin, the sea urchin. By analyzing the newly sequenced genome of the spineless creature, an international team of scientists found just how much we have in common with them. The research could lead to new drugs for human ills. “The sea urchin is surprisingly similar to...
Greatest Mass Extinction Gave Oceans a Face Lift
Oct 31, 2006
Greatest Mass Extinction Gave Oceans a Face Lift
The largest extinction in Earth's history not only wiped out 95 percent of sea creatures and 70 percent of land animals, it also gave the oceans a fundamental face lift, according to a new study. Before the end-Permian mass extinction 250 million years ago, the seas were home to a...
Female Chimps Fight Back
Oct 31, 2006
Female Chimps Fight Back
Female chimpanzees in the wild form coalitions to retaliate against aggressive males, a new study reveals. Nicholas Newton-Fisher of the University of Kent studied a community of eight adult male and 21 adult female East African chimpanzees in the Budongo Forest, Uganda. The females were subject to frequent aggression by...
Mammal Extinction Blamed on Earth's Wobble
Sep 30, 2006
Mammal Extinction Blamed on Earth's Wobble
The emergence and disappearance of species of mammals could be due to wobbles in the Earth's orbit, suggests a new study. Surveying 22 million years of rodent fossil records, researchers found that peak species turnover corresponded to variations in the shape of the planet's orbit around the Sun, which oscillates...
Ancient Miniature Buffalo Discovered
Sep 30, 2006
Ancient Miniature Buffalo Discovered
The bones of an extinct dwarf species of buffalo were recently unearthed on the Philippine island of Cebu. Dubbed Bubalus cebuensis (BOO-buh-luhs seh-boo-EN-sis), the miniature buffalo [image] stood at just more than two feet, three times smaller than today's domestic buffalo, and weighed a mere 350 pounds. It probably lived...
Sucking Up: Why Monkeys Groom the Boss
Sep 30, 2006
Sucking Up: Why Monkeys Groom the Boss
Sucking up to win the support of the boss dates back to our furry ancestors. The motivation, for monkeys, is life and death. Rather than grabbing coffee for the CEO, monkeys have for eons picked dead skin and bugs from the fur of higher-ranking monkeys. They do it in exchange...
Diet Linked to Brain Size in Primates
Sep 30, 2006
Diet Linked to Brain Size in Primates
Brain tissue is expensive for a body to produce, so when times are tough, some primates go with a smaller noodle, a new study suggests. Scientists compared orangutans living on the Indonesian islands of Borneo and Sumatra. The subspecies Pongo pygmaeus morio, living in northeastern part of Borneo where food...
Tool Time: Crows Share Tricks of the Trade
Sep 30, 2006
Tool Time: Crows Share Tricks of the Trade
Bird brained they might be, but crows are the MacGyvers of the avian world, able to turn twigs and even their own feathers into tools for getting at hard-to-reach food. But while young crows are born with a propensity for crafting tools, it's only after watching their elders make and...
Mother Deer Can't Recognize Fawn's Cry
Aug 31, 2006
Mother Deer Can't Recognize Fawn's Cry
Fawns are keenly tuned to their mothers' voices, but female fallow deer can't recognize their own offspring based on sound alone, a new study finds. The imbalance is an example of how the type of environment a species lives in affects how parents and offspring communicate, the researchers say. Using...
Unknown Dinosaurs: Golden Age of Discovery Ahead
Aug 31, 2006
Unknown Dinosaurs: Golden Age of Discovery Ahead
The next several decades could prove a golden age for dinosaur hunters looking to discover new species of the ancient reptiles. A new statistical analysis predicts that more than 1,300 unique dinosaur genera await discovery by paleontologists. In biology, a genus is an organizational group made up of one or...
Wild Chimps Use Crossing Guards
Aug 31, 2006
Wild Chimps Use Crossing Guards
Elementary school children aren't the only ones who need crossing guards. Scientists report that wild chimpanzees safely cross roads with the aid of adult males that serve as traffic patrollers. Dominant male chimpanzees walk ahead of their groups and evaluate risks of crossing a road before signaling the rest of...
Vicious Ants Made to Attack Their Own
Aug 31, 2006
Vicious Ants Made to Attack Their Own
They may be tiny, but Argentine ants can kick some ant butt. This invasive species has nearly wiped out native ants in California. Now scientists have discovered a way to turn one of the ants' strongest weapons into a weakness. By altering the identifying chemicals coating the ants' bodies, researchers...
Some Fish Sniff Out Their Siblings
Aug 31, 2006
Some Fish Sniff Out Their Siblings
In the fish world, traditional roles are typically reversed with the male building the nest, completing nest-keeping tasks, and protecting and caring for the young. Since female fish lay their eggs in an already-built nest before swimming away, the hard work ensures a male fish will pass along his genes....
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