Comcast has rolled out a new motion sensing technology to its latest home routers, allowing homeowners to receive notifications about activity detected inside their house while they are away. The free feature, called Wi-Fi Motion, turns newer Xfinity gateways into motion sensors by detecting interruptions to the Wi-Fi signal of the wireless network, and sends
At the top and bottom of the planet, the seasons arrive on a schedule all their own. Satellite data from a mission measuring infrared energy reveal just how differently—and how dramatically—surface temperatures swing across two full years at the poles. In this animation, surface temperatures across the Arctic and Antarctic pulse between cold (dark blue)
