Dolphins vigilant round-the-clock, even while asleep

WASHINGTON - Dolphins have a clever way of remaining vigilant round-the-clock, by sending half their brain to sleep, while keeping the other half awake.

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Primate ancestors of HIV could be younger than previously believed

WASHINGTON - In a surprising discovery, scientists have found that the ancestors of the simian immunodeficiency viruses (SIVs) that jumped from chimpanzees and monkeys, and ignited the HIV/AIDS pandemic in humans, originated just a few centuries ago.

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The trio of musts that Obamas’ pooch, Bo, needs to learn

CHICAGO - Experts have come up with the trio of musts that all pooch owners, including the Obamas, need to practice with their pets, namely exercise, affection and obedience.

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