Malls, stores consider new ways to protect shoppers

More sophisticated cameras. Security robots. Customers feeling shaken by recent attacks at U.S. malls may not notice huge changes—but mall operators are testing and putting in place new technologies and other measures to ...

Using rust and water to store solar energy as hydrogen

How can solar energy be stored so that it can be available any time, day or night, when the sun shining or not? EPFL scientists are developing a technology that can transform light energy into a clean fuel that has a neutral ...

Blocked holes can enhance rather than stop light going through

Conventional wisdom would say that blocking a hole would prevent light from going through it, but Princeton University engineers have discovered the opposite to be true. A research team has found that placing a metal cap ...

Geologist says there's no need to fight over mineral resources

It's easy to be a pessimist in a world full of calamities. But for those worried about the continuing availability of natural resources, data from the ocean makes a good case for optimism, says economic geologist Lawrence ...