GAS LEAK Flyovers of North America’s Bakken oil and gas field reveal that the region releases a significant amount of the world’s ethane emissions, a gas that can damage air quality and warm the climate.
DEATH BY BUBBLE Mundane tools beat fancy X-ray setups in tracking how invading air bubbles kill leaves during drought, as seen in (clockwise from top) a Pteris fern, oak leaf and Adiantum fern.
T.J. Brodribb et al/PNAS 2016
An epidemic of sea star wasting disease struck starfish species, including Pisaster ochraceus, along the west coast of North America, starting in 2013. Scientists are still trying to figure out what causes the disease.