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Not just a way to beat the heat, urban forests also reduce air pollution and provide other services for the economy. kiddocone/flickr

Why more cities need to add up the economic value of trees

Cutting-edge urban foresters argue not only for the intrinsic value of trees but also for the many economic and health benefits.
Nano-architects design materials that can work together at very tiny scales, like these interlocking gears made of carbon tubes and benzene molecules. NASA

Molecular architects: how scientists design new materials

One of the great technological challenges of this century is to design novel items and then make them – and have the results match the intent.
What does the progress of black students look like? Jason Reed/Reuters

Are all black students falling behind?

Statistics on black student graduation rates don’t reveal the complete picture: at highly selective colleges and universities, black student graduation rates range from 88 percent to 96 percent.
In a sense, aren’t they one and the same? 'Heads' via www.shutterstock.com

Why it’s impossible to actually be a vegetarian

When you think about it, it’s a bit strange to view food through a lens of “meat” and “not meat” – especially when plants consume animals, and vice versa.
White storks on road near Chernobyl, Ukraine. Many parts of the Chernobyl region have low radioactivity levels and serve as refuges for plants and animals. Tim Mousseau

At Chernobyl and Fukushima, radioactivity has seriously harmed wildlife

How do we measure long-term impacts of nuclear accidents? Studies at Chernobyl and Fukushima show that radiation has harmed animals, birds and insects and reduced biodiversity at both sites.
Your phone’s just sitting there, innocently…. Tabletop image via www.shutterstock.com.

Your devices’ latest feature? They can spy on your every move

Bad guys or law enforcement could hack into our networked gadgets to spy on everything we do – and it’s not clear how a laptop’s video camera or an Amazon Echo fits within wiretapping laws.