My arsenal included a $29.99 solar ultrasonic animal repellent/outdoor motion detector with LED flashing lights, a $27.99 ...

A new material developed at Penn State defies a fundamental law of physics, opening doors to highly efficient solar cells.

The dwarf planet Sedna will fly nearer the Sun in 2076. A nuclear rocket or a solar sail spacecraft could reach it within 7 ...

Designed for high-resolution surveillance and easy wireless installation, the new WS800 system is available in 8-channel and 16-channel versions. It supports ultra-clear 4K video, intelligent motion ...