Light that is reflected back from the edge of the medium it is traveling through. When light rays travel at an angle greater than the "critical" angle, which is determined by the medium, the light ...

Cool operator: the Saharan silver ant Cataglyphis bombycina. (Courtesy: P Landmann) A species of desert-dwelling ant is able to tolerate temperatures exceeding 50 °C because its body hairs act like ...

The DeltaVision OMX V4 enables Total Internal Reflection Fluorescence Microscopy (TIRF). This technique uses an evanescent wave to selectively excite fluorophores that are close to the coverslip. This ...

“There is no branch of detective science that is so important and so much neglected as the art of tracing footsteps,” says the fictional detective Sherlock Holmes. Now, UK researchers have developed a ...

If you want to visualize what happens at a biological interface or on the surface of a cell, it is vital to eliminate the background that comprises all the stuff that sits beyond that first layer.