World Science: Of cannibals, planets and jilted dogs
* Bird attacks a force in human
Prehistoric raptors may have routinely
targeted our ancestors for meals, scientists
* A trip to cannibal country:
A journalist ventures into one of the last places on
Earth where humans eat each other, and like it.
* Pluto no longer a planet:
A newly adopted definition of "planet" shuts out a
longtime member of the planetary club.
* Researchers create permanently "happy" mice:
A breed of permanently "cheerful" mice is providing
hope for depression treatment, scientists report.
* New stem cell technique would avoid killing
Scientists say they've managed to grow human
embryonic stem cells without destroying embryos.
* Jilted dogs feel intense jealousy, study finds:
New research challenges long-held scientific beliefs
about animal emotions.
* Ants' Olympic jumps caught on tape:
New high-speed videoclips show how certain ants
manage to jump 40 times their own length.
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