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.
BRAIN ACTIVITY Human versions of some genes are more active in certain parts of the brain than Neandertal versions. Side and back views of a brain show that activity levels of the Neandertal version of a gene called NTRK2 are lower in the cerebellum (blue area in lower back) than in other regions.
R.C. McCoy, J. Wakefield and J.M. Akey/Cell 2017
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
DYNASTIC CENTER Recovered DNA suggests that nine people buried in a huge structure called Pueblo Bonito (shown), located in northwestern New Mexico, belonged to a maternal dynasty that lasted for 330 years during the heyday of ancient Chaco society.