Saber-Toothed Tales
Perfect fossils from a smelly tar pit tell us what the saber-toothed cat looked like. But it's the pit's broken and mangled bones that tell us how the cat actually lived.
by Rosie Mestel
Nuclear Detectives
In California some gumshoe physicists are using a particle accelerator to nab polluters.
Mysteries of the Orient
A half-billion years ago the remarkably complex forms of animals we see today suddenly appeared. A new bonanza of Chinese fossils may finally tell us why.
Loops of Space
Gravity and subatomic forces may both arise from a fine mesh of space-time loops.
Killer Algae
A horrific predatory little plant is beating up on fish around the world.
