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Fluorescence microscopy reveals sperm, in red, invading a female worm's body. Credit: Gavin Woodruff.

"Killer Sperm" Prevents Mating Between Worm Species

"Killer Sperm" Prevents Mating Between Worm Species

Artistic illustration of the gas planet HD 209458b (unofficially named Osiris). Credit: NASA, ESA and G. Bacon (STScl).

Hubble Finds Three Surprisingly Dry Exoplanets

Hubble Finds Three Surprisingly Dry Exoplanets

air waveguides - Howard Milchberg

Creating Optical Cables Out of Thin Air

Creating Optical Cables Out of Thin Air

Birdsnap screenshot

Bird Watching: There's an App for That

Bird Watching: There's an App for That

Birdsnap is the latest electronic field guide developed by UMD, Columbia University, and Smithsonian scientists.

Ribosomal frameshifting in the CCR5 mRNA. Image: Jon Dinman.

Rewriting the Rules

Rewriting the Rules

Newly discovered process alters protein assembly in human cells, changes immune response.