Black-capped chickadees clamor around bird feeders in the winter. They have a diet that many of us might envy -- they eat all day long, and lose much of it overnight.
Look closely. The beetles on this branch eat only invasive hemlock woolly adelgid. Scientists hope the beetle will spread through forests where the pest has decimated Eastern hemlocks.
Scientists are hoping a genetically modified American chestnut can restore the iconic tree. Some groups say it could be a Trojan horse for more GMO trees.
