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Black hole may be feeding on asteroids
BRISTOL, England, April 19 (UPI) -- British researchers say some birds serve as guards to keep their foraging colleagues safe while looking for food.
The findings, published in the journal Current Biology, suggest that the distinctive watchman's song of the pied babblers is a rare example of cooperative behavior in the animal world, the University of Bristol said in a release.
"The unselfish behavior of the sentry was rewarded further down the line by the improved survival of individuals, which in turn leads to a larger group size," researcher Andy Radford said in a statement. "This increases the sentinel's chances of survival when the group is under attack or having to repel rivals from the territory."
Radford said when a sentry bird was present the group was able to spread out more and spend more time in the open, allowing the group to catch bigger and better prey.
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WASHINGTON, Feb. 13 (UPI) --
Ships supplying the U.S. base in Antarctica are relying on Russian icebreakers to provide shipping channels, with few available U.S. cutters, officials said.
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NEWARK, N.J., Feb. 13 (UPI) --
A funeral is being planned for songstress Whitney Houston in her hometown of Newark, N.J., later this week, sources close to her family told NBC New York.
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KNOXVILLE, Tenn., Feb. 13 (UPI) --
Electric cars in China are having an impact on pollution more harmful to health than gasoline vehicles, U.S. researchers say.
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NEWPORT, R.I., Feb. 13 (UPI) --
Lottery officials said Monday the winning $336.4 million Powerball ticket was sold at a Rhode Island convenience store, but the winner had yet to come forward.
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