Saw a great product advertised -- it was a hearing aid made to look like a Bluetooth headset. Its for people who are embarrassed about wearing a hearing aid but not about wearing a Bluetooth headset.
In 1968, the Explorer 38, an unmanned U.S. spacecraft was launched to measure galactic radio sources and study low frequencies in space. It was one of a series of 55 scientific satellites launched between 1958-75.
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