In the March 4 SN: Search for sustainable catalysts, deflating cancer’s defenses, species miscounts, frog spit secrets, an acrobatic bat robot, coconut-cracking crabs, baffling X-ray bump, neutron’s elusive lifetime, Zika’s baby photo and more.
LOW T As men age, testosterone levels in the blood tend to drop. Replacing the hormone through testosterone treatments brings an assortment of benefits and potential problems.
OXYGEN DEPRIVATION Cancer cells (shown in blue) surround a blood vessel (red) in a mouse tumor. Cells on the tumor’s edge are dying, starved of oxygen. But treatments to starve tumors have come up short.
C. Michiels, C. Tellier and O. Feron/Biochimica et Biophysica Acta 2016
NOT SO FUN The fungus Pichia (shown), a type of yeast, is linked to kids’ likelihood of developing asthma, new research shows.