News tagged with population size

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Cheating favors extinction

Cooperative behaviour is widely observed in nature, but there remains the possibility that so-called 'cheaters' can exploit the system, taking without giving, with uncertain consequences for the social unit ...

Apr 30, 2013
4.1 / 5 (16) 70 | with audio podcast

Buried Coins Key to Roman Population Mystery?

(PhysOrg.com) -- The first century BC in Italy was culturally a brilliant age, unequaled by any other period in Roman history. It was a time of Cicero, Caesar, Vergil, Horace and many other major literary ...

Oct 05, 2009
3.5 / 5 (14) 2

Honeybees show tipping points

Parasites, lack of food, cold snaps, pesticides, and poor management all can stress honeybee colonies, making it difficult to pin their collapse on a single source. However, in controlled field tests, honeybee ...

May 16, 2014
5 / 5 (6) 0

Environmental change triggers rapid evolution

A University of Leeds-led study, published in the journal Ecology Letters, overturns the common assumption that evolution only occurs gradually over hundreds or thousands of years.

Apr 09, 2013
5 / 5 (2) 0 | with audio podcast

Giant moa had climate change figured out

(Phys.org) -- An international team of scientists involving researchers from the University of Adelaide has used ancient DNA from bones of giant extinct New Zealand birds to show that significant climate and ...

Aug 06, 2012
5 / 5 (4) 0 | with audio podcast