Detecting nuclear tests with GPS; moon tourism; recycling plastic into pavement; hydrogel from DNA; trampoline sidewalk; and parrot car.Detecting nuclear tests with GPS; moon tourism; recycling plastic into pavement; hydrogel from DNA; trampoline sidewalk; and parrot car.

Computer-simulated brain; robots in cow stomachs; melt-resistant chocolate; electricity from marshlands; bladeless ceiling fan; and infrared invisibility.

Robot waverider survives Sandy; inflatable plug for flooding; dental music player; nanotube transistors; gasoline from air; and deflecting asteroids with paint.

Seismologists convicted of manslaughter; finding damaged nuclear cores; power outage missile; robot tightrope-walker; testing bridges with rain; and bricks from cow blood.

Recovering a cruise ship; improvising robots; improving carbon dating accuracy; wheelchair climbs steps; silk data transmission; and trampoline bridge.

Top stories this week include Martian rocks show evidence of a watery history, How surgeons could use electronic implants that dissolve, and Planet made of diamonds.

Quadcopters play catch; wiki weapon 3D printer confiscated; sweating buildings; cooling the earth with asteroid dust; voice-controlled home automation; and cheese-powered race car.

The Mars rover has detected proof of a river and alluvial plain on Mars. The river flowed for thousands, or perhaps even millions of years. We wonder what happened to that river.

Chem-free oil cleanup; droplet levitation; refrigerator recycler; Gaza electric car; robot tentacle; and LEGO supercomputer.

Solar desalination; robot quadruped speed record; robots repair coral reefs; hydrogel bounces a ball; repairing space station with a toothbrush; and bird-friendly turbine.