Science & Technology

Science and technology news

How Can You See Without Seeing?

Nov 20, 2015

Part 2 of the TED Radio Hour episode Adaptation

About Daniel Kish's TED Talk

Daniel Kish has been blind since he was 13 months old, but has learned to "see" using a form of echolocation.

About Daniel Kish

When he was 13 months old, Daniel Kish lost both eyes to retinal cancer. He taught himself to navigate by clicking his tongue and listening for echoes — a method science calls echolocation, and that Kish calls flash sonar.

How Did Endurance Help Early Humans Survive?

Nov 20, 2015

Part 1 of the TED Radio Hour episode Adaptation

About Christopher McDougall's TED Talk

Christopher McDougall explores the mysteries of the human instinct to run: How did endurance help early humans survive, and what urges from our ancient ancestors spur us on today?

About Christopher McDougall

Two tech startups you know have now gone public: Square (which makes the little white square to swipe credit cards) and Match, the online dating giant. Both companies got nice, first-day pops to their share prices as they started selling for well above the initial price. But interestingly, those initial prices were set low.

Really low.

Square was planning to price somewhere between $11 and $13 a share, which, analysts say, is already pretty cheap. But then, the company went even lower, settling for just $9. That's really, really cheap.

A kind of salmon that's been genetically modified so that it grows faster may be on the way to a supermarket near you. The Food and Drug Administration approved the fish on Thursday — a decision that environmental and food-safety groups are vowing to fight.

Vocal cords are small and complex — and, when badly damaged, they're difficult to treat.

Now, scientists at the University of Wisconsin-Madison have engineered lab-grown vocal cord tissue for the first time.

The tissue appears to be functional, the researchers report, although so far it has only been tested outside of an animal's body.