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.
WIDENING GULF A Delaware-sized iceberg calved when a crack in the Larsen C ice shelf reached the Weddell Sea this year. In this satellite image from September, rifts are visible in the ice and clouds cast a shadow on the new iceberg.
NASA Earth observatory, joshua stevens, Landsat data, USGS
BABY PICS Scientists are keeping an eye on the rates of erosion of volcanic ash on Earth’s newest island, called Hunga Tonga-Hunga Ha’apai.
Cecile Sabau, Damien Grouille, NASA
FREEZE AND FLEE Narwhals, mammals known as “unicorns of the sea” for their single tusk, have another oddity: Their hearts slow to near-arrest during frantic flights into the deep.