It’s a deadly bacterium that can spread like wildfire. New research suggests Yersinia pestis first developed its ability to cause lung infection and then evolved to be highly infectious.
Throughout history, most people have used marijuana to escape the toils of everyday life.
'Joint' via www.shutterstock.com
The Supreme Court let stand a lower court ruling against mandatory ultrasounds for women seeking abortions, but the court leaves in place major—and growing—restrictions on women’s health policies.
While the higher gas mileage may lead people to drive a green car more often, its other attributes may be less appealing.
Green car via www.shutterstock.com
Some worry that efforts to reduce energy consumption by increasing fuel efficiency cause a so-called rebound effect that eats into the expected savings. We tested the theory.
Friendships could prevent later bullying.
Maria Grazia Montagnari
What are the consequences of defining marriage as a “fundamental liberty”? And what difference will this ruling make to discrimination against gays and lesbians in other areas of life?
Satellite image showing clouds over the Greenland Sea downstream of the ice edge during conditions where there was a large transfer of heat and moisture from the ocean to the atmosphere.
NASA
Hydrologists, climate scientists and policymakers are beginning to grapple with a difficult question: who will be affected most by longer and more frequent droughts?
Some atomic ratio detective work on our solar system neighbors tells us a lot about their watery pasts. That Venus and Mars are mostly dry now could be a cautionary tale for us on the Blue Planet.
What is the problem with teaching at graduate schools?
fordhamalumni
Can Dzhokhar Tsarnaev and Dylann Roof be forgiven — and should they? Forgiveness is not an isolated, one-time act but a longer commitment to acceptance back into a community.
Celebrating the ruling in Washington, June 26 2015.
Joshua Roberts/Reuters
Same-sex marriage is now a legal right. How the justices arrived at this ruling. the critical role of Anthony Kennedy and the potential impact of the dissenters’ decisions.
Should mobile devices be encouraged in class?
Trinity College
From the look of it, the millennials appear to be very comfortable with technology. But are they as immune to the effects of digital distraction as some might assume – especially in the classroom?
Will the US-China relationship devolve into Spy vs Spy?
greyloch/Flickr
The same persistent weather pattern bringing hot, dry conditions to California is likely connected to a punishing drought in the Sao Paulo area in Brazil.
The Reverend Pinckney’s casket enters Emanuel Church.
Brian Snyder/Reuters
Blacks and Hispanics do tip, on average, less than whites. But research shows waiters aren’t only motivated by economics when they offer inferior service.
Just how quickly are those thoughts bouncing around in there?
Head image via www.shutterstock.com
Sensory information comes into the system, and we initiate actions in response. Quantifying how quickly that happens is tricky – especially since our own perceptions of the timing aren’t quite right.