Poorly protected files reveal a massive surveillance scheme.
Thin but efficient solar cells use one-tenth the silicon of conventional cells.
A new approach avoids flexible electronics.
New millimeter-wave technology sends data at 10 gigabits per second.
A hybrid refrigerator will bring efficient, cheap cooling to India.
Researchers have engineered aluminum-tolerant crops.
A broad-acting vaccine might be key.
Sending false signals to GPS receivers could disrupt critical infrastructure.
An adjustable-focus lens made of two drops of water could be used in small cameras.
A new biomaterial could improve knee-cartilage repair surgery.