IT should be impossible, but a prototype space engine appears to produce energy from nothing — and it just passed a big test. The reactionless thruster was met with a surge of excitement — and ...

Objective To review the specificity of exercises designed to condition the lumbar extensor musculature (ie, lumbar erector spinae and multifidus). Methods A review of studies examining effects of ...

Whirligig beetles, the world's fastest-swimming insect, achieve surprising speeds by employing a strategy shared by speedy marine mammals and waterfowl, according to a new Cornell University study ...

Objective This study aimed to investigate how knee extensor and flexor strength change over time after anterior cruciate ligament reconstruction (ACLR). Design Systematic review with longitudinal meta ...

Abstract: This article presents a geometric reachable-set-theory-based solution for spacecraft orbital rendezvous under constant-magnitude continuous thrust, addressing two problems: minimum-time ...

Abstract: OBJECTIVE: The study seeks to determine whether a powered, cable-driven exosuit has the potential to lower the lumbar muscle activity and overall metabolic expenditure of symmetric and ...