Unusual material expands dramatically under pressure

If you squeeze a normal object in all directions, it shrinks in all directions. But a few strange materials will actually grow in one dimension when compressed. A team of chemists has now discovered a structure that takes ...

A secret to making macrophages (w/ Video)

Biologists at the California Institute of Technology (Caltech) have worked out the details of a mechanism that leads undifferentiated blood stem cells to become macrophages—immune cells that attack bacteria and other foreign ...

Shorebirds prefer a good body to a large brain

In many animal species, males and females differ in terms of their brain size. The most common explanation is that these differences stem from sexual selection. But predictions are not always certain. A team of researchers ...

Coalition seeks release of surveillance data

A coalition of Internet firms and activist organizations asked the US government Thursday to issue "transparency reports" on its online and phone data collection programs which have sparked an outcry.

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