World Science: "Gangster" bird found to charge for protection
* "Gangster" bird found to charge for protection:
An avian species in Africa runs what some scientists
are likening to a protection racket.
* Report of ancient meat-fest by human
Some researchers are skeptical of a study finding
that ancestral humans butchered animals over three
million years ago.
* Giant "bubbles" lurk at heart of Milky Way:
Astronomers are trying to understand a huge,
mysterious structure newly identified in our galaxy.
* "Johnny has two daddies" may have been
common in Amazon cultures:
Widespread promiscuity was tied to some surprising
ideas about paternity in many ancient societies,
* Depressing reverie fills almost half our
waking lives: study:
It may be best to try to live in the moment -- just
as some religions advise, psychologists say.
* Microbes attack each other with "poison-
* U.S. scientists more likely to publish
* Bilingualism may delay Alzheimer's:
* Bars may kill spiral galaxies:
* Looking older than your age may not
mean bad health:
* Goose eggs may help save warmth-
battered polar bear:
* Moving 3D images may be inching
toward real-life use:
* Galaxies detected by "shadows":
* Friendships seen as key to success for
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