Large testicles are linked to infidelity

There is a clear correlation between the size of the testicles of male primates and the proneness to infidelity of females. Learn more about sex, sperm and infidelity at the anniversary exhibition Sexus.

'Testicle-munching' Amazon fish found off Denmark

A Danish fisherman made an unusual find in his nets recently when he discovered a pacu, a sharp-toothed cousin of the South American piranha with a reported penchant for testicles.