Another study, in Botswana, found that younger males seek ... Not even an alpha male would risk challenging a bull elephant with a heightened level of testosterone. Or so I thought.

Botswana’s Department of Wildlife and National ... others nuzzle and groom their herd mates. Suddenly three bull elephants stampede across the flanking hillside, trailing clouds of dust.

How an enormous bull elephant with spectacular tusks roams the plains.