Still, caffeine can cause some "cellular stress" to organisms, and another study this month will expose mussels to similar doses of caffeine to see itseffects on their reproductive activity.
The Motion Picture Association of America is already working on its own economic study of the harmful effects of file sharing, to be completed this autumn.
The satellite - which had been intended tostudy the effects of climate change - should have separated from the rocket and deployed its solar panels some nine minutes after take-off, at an altitude of 302km.
Naurex said the main side effects in a Phase IIa study of its GLYX-13 compound with 116 people with depression were headache and sleepiness, similar to the effects of a placebo saline injection.