As koalas in southern Australia have grown from a few hundred to almost half a million, the marsupials show signs of regaining lost genetic variation.

Population crashes are dangerous and can be irreversible. But new research shows they are not always an evolutionary dead end.

Hybridization of other crops followed suit, including canola, rice, sorghum, sunflowers and wheat. Soybean remains an exception because its pollen shed occurs within a closed flower, making ...