August 19, 2017 | Science News

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August 19, 2017View Digital Issue

Editor's Note

Acting Editor in Chief Elizabeth Quill discusses how the natural world feeds our sense of wonder.
By Elizabeth Quill | August 8, 2017
Magazine issue: Vol. 192 No. 2 , August 19, 2017 , p. 2

Features

Black-legged tick

Feature

Researchers acknowledge that there’s no getting rid of ticks, so they are developing ways to make them less dangerous.
Photographs of Rwandans killed in 1994 genocide

Feature

New research on the 1994 Rwanda genocide overturns assumptions about why people participate in genocide. A sense of duty, not blind obedience, drives many perpetrators.

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Editor's Note

Acting Editor in Chief Elizabeth Quill discusses how the natural world feeds our sense of wonder.

Features

Photographs of Rwandans killed in 1994 genocide
New research on the 1994 Rwanda genocide overturns assumptions about why people participate in genocide. A sense of duty, not blind obedience, drives many perpetrators.
Black-legged tick
Researchers acknowledge that there’s no getting rid of ticks, so they are developing ways to make them less dangerous.

News

Ötzi the Iceman’s ax
Copper for the ancient Iceman’s blade traveled about 500 kilometers to his northern Italian home region.
Ramazzottius varieornatus
Genetic studies reveal more secrets of the bizarre creatures known as tardigrades.
microscope image of copper
It turns out that thin films of copper don’t lay flat, a discovery that has implications for computers and handheld electronics.
galaxies M81 and M82
A galaxy may swipe up to half of its atoms from other galaxies, making the Milky Way mostly extragalactic stuff, new simulations suggest.
blue chrysanthemum
Scientists have genetically modified chrysanthemums to be “true blue” for the first time.
football players
A self-selected sample of 202 deceased football players, the largest to date, finds that the majority suffered from chronic traumatic encephalopathy.
Global warming could force airplanes to carry a lighter load — and fewer passengers —on each flight.
microlensing illustration
Jupiter-mass planets without parent solar systems are less common than astronomers thought, a new study suggests.
Prevotella
Certain bacteria found on the penis raise the risk of HIV infection, a new study finds.
bro with dog
Dog domestication may be the result of just a few genetic changes, including ones that made canines more interested in interacting with people.
Madjedbebe rock shelter
Australia may have said “G’day” to humankind thousands of years earlier than previously believed.
Maxwell’s Demon illustration
Scientists probe information retained by Maxwell’s demon.
raven
Clever birds may have evolved their own broad powers of apelike thinking about the future.
mouse fight
In mice, nerve cells in the prefrontal cortex influence whether an individual is dominant or submissive.
illustration of exomoons
A distant object may be the first exomoon detected.
Majorana fermions in a topological insulator
Scientists found evidence of a particle that is its own antiparticle.
brown cow
For the first time in any animal, researchers elicit broadly neutralizing antibodies against HIV. Cows’ antibodies could help with drug development.

Notebook

Tube worms
Deep-sea tube worms can live decades longer than their shallow-water counterparts.
Nephila edulis spider
Scientists reveal a new twist on the unusual properties of spider silk.
Eusaurosphargis dalsassoi
An exquisitely preserved fossil shows that an ancient armored reptile called Eusaurosphargis dalsassoi wasn’t aquatic, as scientists had suspected.
Today, scientists are still trying to improve steel.
Yemeni women waiting for charity water
As the cholera epidemic rages on in war-torn Yemen, basic hygiene is the first line of defense.

Reviews & Previews

Saturn
A new TV documentary is a tender tribute to Voyagers 1 and 2, which launched 40 years ago and were the first spacecraft to visit the outer solar system.

Letters to the Editor

Readers responded to fish lips, monkey brains, sunless tanner and more.

Science Visualized

cheetah and wildebeests
New analysis delves into the mystery of why medium-sized animals are speedier than bigger ones.