The human use of fire, attested by evidence from Africa, goes back around 1.6m years. But, hitherto, the oldest signs of deliberate fire-setting by striking pyrite with flints, unearthed in France, ...

In 2008, a team of UCLA-led scientists proposed a scheme to use a laser to excite the nucleus of thorium atoms to realize extremely accurate, portable clocks. Last year, they realized this ...

Veterans flood Democrat’s office with supportive calls as backlash grows over ‘illegal orders’ video Flight diverted in Texas for hours—passengers not prepared for what arrives 17-year-old arrested in ...

Abstract: In order to improve the applicability of wearable devices in the field of human motion recognition and expand their applicability in the upper limbs, this article proposed a ...