A pair of tweezers holds a graphene transistor fabricated on a silicon wafer. An I-Corps team from the University of Pennsylvania is working on scaling up their cheaper method of making high-quality graphene, an extremely strong, conductive material one atom thick that was the subject of a Nobel Prize last year.
Arielle Schacter, 17, holds her hearing aid in a New York subway station. Hearing loop technology funnels a transit worker's voice into her ear, blocking out the subway noise behind her.
Ashley Milne-Tyte for NPR
A boat navigates along the Black River near the village of Tumbira, in the Amazon, northern Brazil, on Aug. 18. In a few weeks, Google will post a 3-D, on-the-ground view of Tumbira on Google Earth Outreach.