Visual distress signals (VDS) are mandatory on most boats but hopefully never needed. VDS come in various flavors. You should not only check at the start of every season to make sure your flares are ...

With news this week of the messaging app being used to discuss war plans, we get you up to speed on what Signal should be used for—and what it shouldn’t. MIT Technology Review Explains: Let our ...

Using a toy gun converted into a laser pointer, a test subject in Chalmers' acoustics lab tries to locate warning sounds from electric cars. One of the most common signal types turned out to be very ...