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.
IT’SELECTRIC A new type of energy source made with hydrogel disks (shown) works a lot like the power-producing organs inside electric eels.
Thomas Schroeder and Anirvan Guha
AI SPY A new type of artificial neural network has its virtual neurons (like the one illustrated above) organized into clusters called capsules. This helps the network more easily identify objects from new angles than its traditional counterparts.
IT’S ALIVE Living bacteria can give 3-D printed materials special powers, such as producing form-fitting wound dressings. Here, such a material is printed on a doll’s face and stained to fluoresce blue.