Referential alarm calls increase vigilance in brood parasite hosts

Yellow warblers are hosts to brood parasitic brown-headed cowbirds, which rely on other species to raise their offspring. Warblers use referential "seet" calls to warn female warblers specifically of the brood parasitic brown-headed ...

Recreating the sights and sounds of 17th century London

A team of scholars at NC State University has recreated the sights and sounds of St. Paul's Cathedral and its environs in 1620s London, offering anyone who is interested a glimpse of daily life four centuries ago.

Tracing water from river to aquifer

A new technique using dissolved noble gas tracers sheds light on how water moves through an aquifer, with implications for water resources and their vulnerability to climate change.

Video: NASA's guide to near-light-speed travel

So, you've just put the finishing touches on upgrades to your spaceship, and now it can fly at almost the speed of light. We're not quite sure how you pulled it off, but congratulations!

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