Almost all of the 29 coral reefs on U.N. World Heritage list damaged by bleaching
Science There was good news and bad news for the world's coral reefs last week. Story here. A bleached reef off Hawaii. Photo by NOAA.
A farmer sprays pesticides on crops. New research from the lab of Kimberly Parker at the McKelvey School of Engineering shows that amines, sometimes used as an additive in herbicides, can enter the atmosphere, where they pose risks for human health and alter the atmosphere. Credit: Shutterstock