Tumbling oil prices have sent Venezuela’s economy into a tailspin, emptying shelves of many basic consumer goods. One casualty of the crisis: birth control. Condoms are increasingly hard to find, and when they are stocked, the prices are exorbitant. Around $700 for a…

A toxicologist from Australia poked holes in the claims by a group of physicians from Argentina that the pesticide Pyripyroxyfen could be causing microcephaly rather than Zika virus.