Walking, self-contained, adult-size robots are commonplace in robotics labs in Japan and South Korea, but there’s only one made here. Why are we falling behind? By Jacob Ward
The world’s most sophisticated robots don’t assemble trucks or cruise around Mars. They’re designed to support our surging population of elderly and disabled citizens. Meet 10 of the most promising senior-friendly ’bots. By Corey Binns
To circumnavigate the world in a record-breaking 40 days, l’Hydroptère Maxi takes inspiration from the Wright brothers By Dawn Stover
It might seem silly to investigate whether people are happier on the weekend, but behind such truisms are revelations about our brains, our behavior and our environment By Jason Daley
In orbit, debris as small as a metal screw can cripple a vehicle or kill an astronaut. Here are five ideas for cleaning up the growing band of trash circling Earth By David Kushner

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The 6th annual Invention Awards are here, from an inflatable tourniquet to a better lobster trap to spring-loaded hocket skates. This issue is all about the celebration of invention.
Plus: Making synthetic biology breakthroughs in a garage, building a constantly-moving ping-pong table, and a ridiculously overpowered barbecue.
Many of the space debris remedies proposed in the "Cluttered Space" article can be read about in the hard sci-fi comedy KITE. http://www.facebook.com/kitethenovel
I wanted to download iPad app to be able to read your latest issue.after I read the comments from those who did, I changed my mind.
almost all of the comments indicated that 4.99 is not a good buy for an issue.
I have been buying your magazine over 30 years and never missed an issue, I would like to read them on my iPad.
Since I am already a subscriber, why can't I read my purchased paper copies on my iPad for a nominal fee for the app itself only?