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

Running out of space

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

Biology as engineer

Biology as engineer

Long ago, nature devised the hinge and ball and socket for appendages like legs and wings. 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 »