Tears of joy and tears of sadness look different under the microscope

We can cry because we're happy. We can cry because we're sad. We can cry because we're cutting onions. We can cry just because we need to cry. They're all completely different emotions... but are they different tears? Photographer Rose-Lynn Fisher wanted to find out in her series The Topography of Tears. She put dried… » 11/20/13 8:02pm 11/20/13 8:02pm

Why Microscope Slides Should Hang in the Louvre

You might think that a museum adding 2000 new exhibits would need to build a whole new wing. But the latest additions to London's Grant Museum of Zoology all fit into a space the size of a large wardrobe: they're vintage glass microscope slides, bearing specimens taken from everything from fleas to whales. » 2/11/13 8:34am 2/11/13 8:34am