People who attempt to poison themselves with an overdose of prescription drugs have usually had access to plenty of pills. Physicians prescribe even more of these kinds of drugs to patients who survive drug overdose suicide attempts.
The hummingbird’s super-fast wing beats are among the most energy-intensive movements in the animal kingdom. Still, the birds can fly 4,000 metres above sea level, where there is very little oxygen. Scientists have now figured out how this is possible.
A new method for dating ancient sea shells reveals that the Greenland Ice Sheet was smaller between 3,000 and 5,000 years ago than it is today. The new study also indicates that the inland ice is more robust than previously thought.