It is commonly assumed that because males produce many, tiny sperm, they are cheap to produce. Recent work, however, suggests that sperm production is not cost-free. If sperm are costly to produce, ...
13don MSN
Cockroaches become more cautious and change their behaviour after stress, scientists discover
Many people believe that cockroaches are simple creatures that act instinctively rather than consciously. The picture is less ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results