Harvey Leifert

Ancient mammals whacked away—with just the right part of their tails.

As temperatures rise, Australian birds are moving toward the pole.

Scientists figure out how flippers help dolphins swim.

Glue-making may demonstrate that our ancient ancestors multi-tasked.

Scientists look to redraw the map of the ancient world.

Genes help rats survive on a toxic diet.

Some beetles play possum, and for the same reason that possums do: to avoid attention from predators.

Scientists have deliberated the question for years.

Unusual atmospheric phenomena were recorded worldwide in 1761, unexplained at the time.

Twenty Roman soldiers died quickly in a tunnel when the Persians forced in hot, sulfurous gas.

Diamonds may be forever, but that's not true of most minerals.

Crabgrass will get a strong assist from global warming in its campaign to take over your lawn.

Julius Caesar arrived off the coast of Britain in 55 b.c. But where did he land?

They find an escort to take care of them.

Seismic signals from Antarctica's Whillans Ice Stream are as strong as a magnitude-7 earthquake.