World Science: Societies evolve a bit like creatures, study finds
* Societies evolve a bit like creatures,
Increases in political complexity are usually
gradual, as is the case with the complexity of
living things, researchers propose.
* Get them some sleep, scientists say of
Many high-school age delinquents get too little
snooze time, research suggests.
* Butterflies "treat" sick young:
Monarch butterflies seem to use plants to treat
their yet-unborn offspring for an infection,
* Falling U.S. life expectancy rank blamed
on health system:
Smoking, obesity and murders don't explain the
United States' drop in global rankings of life
expectancy, scientists claim.
* Could ingredients of life have formed over a
moon of Saturn?:
The types of molecules necessary to build living
things could have formed in Titan's hazy atmosphere,
* Artificial white light may become eye-friendly:
Scientists aim to make the harsh, artificial-looking
light of today's energy-efficient light bulbs a
thing of the past.
* Neanderthals had feelings too, researchers say:
Neanderthal people had a deep-seated sense of
compassion, their brutish reputation notwithstand-
ing, archaeologists claim.
* Marine census shows ocean life "richer" than
The project also generated an array of beautiful
photographs of sea creatures, some of them new to
* Did volcanoes wipe out Neanderthals?:
The stocky cave men may in large measure have just
been in the wrong place at the wrong time, a study
* Many dinosaurs were taller than thought,
Many dinosaur joints contained thick layers of
cartilage that haven't been accounted for, according
to some researchers.
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