Giving the ultimate gift

Giving the ultimate gift

Listing your Facebook status as “organ donor” seems to induce friends to sign up at organ registries. A new study finds a strong quick More »

3-D printing: Wave of the future

3-D printing: Wave of the future

Layer by layer, 3-D printers fuse tiny particles of plastic or metal, building complex parts from computer instructions — forget hold More »

A new iron age?

A new iron age?

Smelters refine aluminum ore, but not iron ore, with electricity. A new electrolytic process for refining iron ore could save vast More »

Making spears

Making spears

Spears helped our ancestors eat and defend themselves. Spearmaking required ingenuity, experiments and communication. Symmetrical stone More »

Farming, Native American style

Farming, Native American style

Native agriculture could be a sophisticated response to a challenging environment. What were the secrets of permaculture, companion More »

Calendars: A fix needed?

Calendars: A fix needed?

A “permanent” calendar could finally answer the annual, “Uh, what day is New Year’s eve this year?” question. This calendar would place More »

Running out of space

Tommy and his spacedog point up to Spaceship One

With space shuttles in museums, the near-term American plan to return to space relies on other countries or private firms. What are the More »

Biology as engineer

Biology as engineer

Long ago, nature devised the hinge and ball and socket for appendages like legs and wings. The screw is the latest simple machine to More »

Nuclear nightmare in Japan

Nuclear nightmare in Japan

With three nuclear reactors and three pools of spent fuel teetering on the edge of meltdown, Japanese technicians struggled to throttle More »

I robot. Aye science!

I robot. Aye science!

Ocean technology on the move: 1: a robot sub smart enough to find stuff in the deep ocean 2: a metal fish glides for weeks under the More »

Plumbing ancient Mayan plumbing!

Plumbing ancient Mayan plumbing!
A small constriction in a buried pipe shows that the Maya were using pressurized pipes before year 750. It’s more proof that when it More »