In the Dec. 23 & Jan. 6 SN: Our top stories of 2017, grounded pterosaur hatchlings, protectors of the Dead Sea Scrolls, a counterintuitive metamaterial, neutron star sizing, arrow of time reversed, E. coli in flour and more.
FERTILE FOLDS In harbor porpoises (one shown), females have vaginal folds (3-D endocast shown below) that may help them exert control over fertilization.
Solvin Zankl/Alamy Stock Photo
BRAIN GAME Despite being relatively large, a brown bear’s brain is sorely lacking in nerve cells, while a raccoon’s cat-sized brain is packed full, finds a new study that tallies these neurons in carnivores.
Jeremy Teaford/Vanderbilt University
BETTER BLUESSN's article about the wings of this morpho dragonfly creating natural blue colors in a really complicated way was our top online story in 2017.