Inventions

What is 3G and why is it being shut down? An electrical engineer explains
Hugging a cushion that “breathes” can reduce anxiety
Sonic waves could help bones grow back after cancer 
MIT invents $4 solar desalination device
New synthetic tooth enamel is stronger than the natural kind
Shape-shifting material morphs robot from driving to flying
Bionic pacemaker causes heart to beat irregularly — on purpose
MIT engineers invent surgical “duct tape”
MIT’s new material is stronger than steel and as light as plastic
NASA offers $1 million prize for prototypes to grow space food