Butterfly wings consist of many-layered nanostructures. Mimicking them, an international team of researchers has created a silicon wafer that traps both air and light.
A survey finds that people in the U.S., Canada and the U.K. largely support this research but are cautious about implementing intentional climate changes.
A new IPCC summary report suggests that extreme weather events - heat waves, heavy rains, coastal flooding - will worsen in this century as climate warms.