NASA instruments image fireball over Bering Sea

On Dec. 18, 2018, a large "fireball—the term used for exceptionally bright meteors that are visible over a wide area—exploded about 16 miles (26 kilometers) above the Bering Sea. The explosion unleashed an estimated 173 ...

Image: Northeast Kenya

Captured on 1 October 2018 by the Copernicus Sentinel-2A satellite, this image features part of northeast Kenya – an area east of the East African Rift.

Super-resolution microscopy in both space and time

Super-resolution microscopy is a technique that can "see" beyond the diffraction of light, providing unprecedented views of cells and their interior structures and organelles. The technique has garnered increasing interest ...

The world's shortest laser pulse

ETH researchers succeeded in shortening the pulse duration of an X‑ray laser to only 43 attoseconds. With a time resolution in the range of a few quintillionths of a second, they are now able for the first time to observe ...

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