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Giant Ancient Fish Fed Like Whales
: These filter-feeders thrived for more than 100 million years.
Why Swine Flu Fizzled
: H1N1 changed as it spread--but we may not have seen the last of it.
The Science of Chivalry
: Studies of the
shipwrecks shed light on "women and children first."
An Early Dawn for Earth's Complex Life
: Did multicellular organisms get their start 2.1 billion years ago?
Do Physical Laws Vary From Place to Place?
A surprising finding casts doubt on our understanding of the constants of nature.
The Pinkie Pokes Holes in Human Evolution
: Even the littlest bone can change the story of human origins.
A Prehistoric Moby-Dick
, a toothy 12-million-year-old sperm whale.
Plasma Rivers Explain the Quiet Sun
: Researchers have been looking for an explanation for a recent lull in sunspots and flares.
X Prize Shows the Easy Path to a 100-MPG Car
: It doesn't require wild new technology to reach super-efficiency.
Scans Unlock Hidden Life in Vegetative Brains
(pictured): A man believed to be in a vegetative state communicates with doctors using only his thoughts.