When the heat is on, boys will be girls, at least among bearded dragons.

The January/February 2008 issue of Australian Life Scientist is out now.

Shakespeare's witches, in 'Macbeth', were concocting mischief, not some nostrum to ward off plague, but some of the things that imbue today's vaccines with immunogenic fizz would not have been misplaced among the eldritch ingredients in their cauldron.

Hundreds of Australians have endured misery and debilitating arthritic pain in the joints after being infected by mosquito-borne Ross River Virus. The symptoms can last for months, and recovered patients can relapse years later.