A Chinese cargo ship repeatedly intruded into Taiwan’s contiguous and sovereign waters for three months before allegedly ...

Using equations dating from 3rd century China as well as cutting edge weak signal telemetry, Apollo engineers devised a complex but workable system that used an S-Band transponder to take data ...

Passive Integrated Transponder (PIT) tags help scientists ... To activate the tag, a low-frequency radio signal is emitted by a scanning device that generates a close-range electromagnetic field.