The market for kosher food is growing, for reasons both practical and spiritual
Amphibians are dying off faster than any other vertebrate group in the world. Can hormones and IVF save them?
Banning the trade of vulnerable species sometimes makes them more vulnerable.
Researchers are toying with a new option to prevent great-white-shark attacks: predicting when they might strike.
CHARLOTTE JACSON, who is the author of seven juveniles, is children’s book editor for the San Francisco CHRONICLE.