Known as the mother of Colombian corals, at 70, marine biologist Elvira Alvarado is still diving — and pioneering "coral IVF" to help save endangered reefs.
SAN ANDRÉS, Colombia — Nearly 50 years after she first put on a wetsuit, Elvira Alvarado still remembers coming upon a coral reef off Colombia's Caribbean coast.
"Everything was alive. And it was green and bright orange. And there were fishes. And th... [4706 chars]