Researchers track Chinese space station as it falls

A defunct Chinese space station, Tiangong-1, is expected to fall to Earth any day now—on March 31, give or take a few days. When it does, it will be the largest manmade object to re-enter Earth's atmosphere in a decade.

Superman's laser vision a step closer to reality

Superman's ability to shoot laser beams from his eyes has come a step closer to reality, with discoveries made by a research team at the University of St Andrews.

New nerve gas detector built with legos and a smartphone

Researchers at The University of Texas at Austin have designed a way to sense dangerous chemicals using, in part, a simple rig consisting of a smartphone and a box made from Lego bricks, which could help first responders ...

Israeli army unveils new 'dual-use' tank

The Israeli army on Thursday revealed details of a new tank it was developing, designed more for use in guerrilla warfare conditions.

InSight lander 'hears' Martian winds

NASA's Interior Exploration using Seismic Investigations, Geodesy and Heat Transport InSight lander, which touched down on Mars just 10 days ago, has provided the first ever "sounds" of Martian winds on the Red Planet. A ...

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Sensor

A sensor is a device that measures a physical quantity and converts it into a signal which can be read by an observer or by an instrument. For example, a mercury thermometer converts the measured temperature into expansion and contraction of a liquid which can be read on a calibrated glass tube. A thermocouple converts temperature to an output voltage which can be read by a voltmeter. For accuracy, all sensors need to be calibrated against known standards.

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