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.

August 19, 2017

COVER: Alfred Pasieka/Getty RIGHT: K. ARAKAWA AND H. HIGASHIYAMA

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Feature

A look at Rwanda’s genocide helps explain why ordinary people kill their neighbors

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.

11 months ago

Psychology,
Science & Society
Feature

Ticks are here to stay. But scientists are finding ways to outsmart them

Researchers acknowledge that there’s no getting rid of ticks, so they are developing ways to make them less dangerous.

11 months ago

Animals,
Science & Society
News

Half of the Milky Way comes from other galaxies

A galaxy may swipe up to half of its atoms from other galaxies, making the Milky Way mostly extragalactic stuff, new simulations suggest.

11 months ago

Astronomy
The Science Life

To combat cholera in Yemen, one scientist goes back to basics

As the cholera epidemic rages on in war-torn Yemen, basic hygiene is the first line of defense.

11 months ago

Science & Society,
Health
News in Brief

Astronomers may have found an exomoon, and Hubble is going to check

A distant object may be the first exomoon detected.

11 months ago

Astronomy,
Exoplanets,
Astrobiology
News

The thinnest films of copper look flat, but they aren’t

It turns out that thin films of copper don’t lay flat, a discovery that has implications for computers and handheld electronics.

11 months ago

Materials
Mystery Solved

How spiders mastered spin control

Scientists reveal a new twist on the unusual properties of spider silk.

11 months ago

Animals,
Biophysics
The –est

These record-breaking tube worms can survive for centuries

Deep-sea tube worms can live decades longer than their shallow-water counterparts.

11 months ago

Animals
News

Borrowed genes give mums the blues

Scientists have genetically modified chrysanthemums to be “true blue” for the first time.

11 months ago

Plants,
Genetics,
Chemistry
Science Visualized

Why midsize animals are the fastest

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

11 months ago

Animals,
Biophysics,
Ecology