In the Feb. 18 SN: Anniversary of a celebrity supernova, readying for the next stellar explosion, human-animal chimeras, hottest year on record, molecules tied in knots, cancer results don’t reproduce and more.
each week, a scientist takes a stroll on the barren upper slopes
of Hawaii’s Mauna Loa
volcano, a basketball-sized glass sphere in hand. At some point, the researcher
faces the wind, takes a deep breath, holds it and strides forward while
twisting open a stopcock. With a whoosh lasting no more than a few seconds, 5
liters of the most pristine air on the planet replaces the vacuum inside the