Decades ago, India’s tigers were on the brink of extinction. Slowly, their numbers have rebounded. But that ecological success has prompted a dire problem—and a race to save many of them from genetic ...

Should we genetically modify wild lions? Of course not, might be your instant response. But what if lions were being wiped out by a devastating disease introduced by people? What if the genetic change ...

Fifty years ago today, scientists met to set safety limits on the new field of genetic engineering. This week researchers meet again to discuss big questions as biotechnology grows more powerful.