Jupiter's Gravitational Mystery May Have Been Caused By Collision With Another Planet

science20.com – The Juno mission, designed to help scientists better understand Jupiter's origin and evolution, was launched in 2011 to map its gravitational and magnetic fields and probe the planet's deep, internal structure.It's found some mysterious gravitational readings which experts infer mean Jupiter's core is less dense and more extended that expected.&nbs

Source: Shang-Fei Liu, et al. The formation of Jupiter’s diluted core by a giant impact. Nature, 2019.

Here’s what happened in the impact crater the day it did in the dinos

arstechnica.com – Rock core allows researchers to create an incredible timeline.

Source: Sean P. S. Gulick, et al. The first day of the Cenozoic. Proceedings of the National Academy of Sciences, 2019.

Thermoelectric Device Generates Light from ‘Darkness of Space’

sci-news.com – A thermoelectric generator device developed by researchers from the University of California, Los Angeles and Stanford University harnesses the cold darkness of space without active heat input, generating electricity that powers LEDs at night.

Source: Aaswath P. Raman, Wei Li, Shanhui Fan. Generating Light from Darkness. Joule, 2019.

MIT engineers develop “blackest black” material to date

mit.edu – Made from carbon nanotubes, the new coating is 10 times darker than other very black materials.

Source: Kehang Cui, Brian L. Wardle. Breakdown of Native Oxide Enables Multifunctional, Free-Form Carbon Nanotube–Metal Hierarchical Architectures. ACS Applied Materials & Interfaces, 2019.

Two New Species of Electric Eels Discovered

sci-news.com – The electric eel (Electrophorus electricus) has long been assumed to be one species, but an international team of scientists has now discovered there are actually three separate ones.

Source: C. David de Santana, et al. Unexpected species diversity in electric eels with a description of the strongest living bioelectricity generator. Nature Communications, 2019.

Astronomers Detect Giant Radio Bubbles in Milky Way’s Center

sci-news.com – Astronomers using the MeerKAT telescope at the South African Radio Astronomy Observatory have spotted a pair of enormous radio-emitting bubbles in the central region of our Milky Way Galaxy.

Source: I. Heywood, et al. Inflation of 430-parsec bipolar radio bubbles in the Galactic Centre by an energetic event. Nature, 2019.

Banging, Zooming, Ringing, and Raining

sciam.com – Explosions on Titan, cometary visitors, a black hole merger, and water in an exoplanetary atmosphere

Source: Valerio Poggiali, et al. High-Resolution Topography of Titan Adapting the Delay/Doppler Algorithm to the Cassini RADAR Altimeter Data. IEEE Transactions on Geoscience and Remote Sensing, 2019.

Vikings probably hunted Iceland's walruses to extinction for ivory

newscientist.com – Iceland had a unique population of walruses that disappeared after people first settled there – probably because the Vikings hunted them to extinction

Source: Xénia Keighley, et al. Disappearance of Icelandic walruses coincided with Norse settlement. Molecular Biology and Evolution, 2019.

Insecticides May Be Giving Songbirds Anorexia and Delaying Their Migrations

discovermagazine.com – Exposure to small amounts of neonicotinoids, a kind of insecticide, made birds eat less and stay longer at stopping points along their migration route.

Source: Margaret L. Eng, Bridget J. M. Stutchbury, Christy A. Morrissey. A neonicotinoid insecticide reduces fueling and delays migration in songbirds. Science, 2019.