In the Aug. 19 SN: Bulletins from the tick wars, roots of Rwandan genocide, spin-resistant spiders, making mums blue, tardigrade saga continues, HIV antibodies from cows, Maxwell’s demon aces memory test and more.
IN THE SHADOW Over the next two decades, more than a dozen total eclipses of the sun will take place around the world.
CRUNCH THE NUMBERS Scientists estimate that the Milky Way contains 100 million black holes.
CHARGED UP Auroras are triggered in Earth’s atmosphere by the solar wind, a constant stream of charged particles wafting away from the sun. This photo of an aurora was taken from the International Space Station on June 26.
New telescopes and spacecraft will soon help researchers scour our galaxy for signs of extraterrestrial life. But what might aliens look like? And if they do exist, why haven’t they returned our calls? These are just some of the questions addressed in the Science News special report “In Search of Aliens” (SN: 4/30/16, p. 24).