Earth’s Core Is Squirting a ‘Jet Stream’ of Liquid Metal Under the Surface

Scientists found it by taking a satellite “x-ray” of the globe. Continue reading Earth’s Core Is Squirting a ‘Jet Stream’ of Liquid Metal Under the Surface

Hackaday Prize Entry: MyComm Handheld Satellite Messenger

We live in a connected world, but that world ends not far beyond the outermost cell phone tower. [John Grant] wants to be connected everywhere, even in regions where no mobile network is available, so he is building a solar powered, handheld satellite messenger: The MyComm – his entry for the Hackaday Prize.

The MyComm is a handheld touch-screen device, much like a smartphone, that connects to the Iridium satellite network to send and receive text messages. At the heart of his build, [John] uses a RockBLOCK Mk2 Iridium SatComm Module hooked up to a Teensy 3.1. The firmware is …read more

Continue reading Hackaday Prize Entry: MyComm Handheld Satellite Messenger