NPR News

Air travel horror stories typically involve lost luggage, missed connections and overzealous security staff. But families affected by autism face other challenges in navigating airports and planes.

A Philadelphia program is bringing families, airport employees and airlines together to help autistic kids fly more comfortably.

Airports are loud, hectic places: blaring announcements, glaring lights and long lines can spell trouble for people with autism. They often can't tolerate noise, bright lights and close quarters.

Steve Inskeep and Linda Wertheimer have business news.

Linda Wertheimer talks to Rich Jaroslovsky, tech columnist for Bloomberg News, about his top gadget picks for 2011.

The digital cloud became a household word in 2011.You can now store and share things via the Internet in ways you never could before. But what does the cloud look like, and where can we find it?

The section of the cloud we visited has a lot of concrete and security.

Behind a ballistics-grade door, data center owner David Sabey ushers us into a spotless Seattle-area facility the size of nine football fields. It's crammed full of racks upon racks of powerful servers, sophisticated computers that serve up information. There are lots of blinking lights and wires everywhere.

Hurricanes topple plenty of trees, but when you think about it, the more amazing thing is that many trees can stand up to these 100-mile-per-hour winds.

Now a French scientist has come up with an explanation for the resilience of trees. And astonishingly, the answer was first described by Leonardo da Vinci 500 years ago.

Leonardo noticed that when trees branch, smaller branches have a precise, mathematical relationship to the branch from which they sprang. Many people have verified Leonardo's rule, as it's known, but no one had a good explanation for it.