Does the secret of Amelia Earhart’s disappearance lie in the underground haunts of the world’s largest land invertebrate? An aerial view of Nikumaroro Island in the Republic of Kiribati. One theory ...

There’s a reason we tend to feel sleepy around the same time each night — and why, if we don’t set an alarm, we tend to wake up at the same time in the mornings. As long as we’re not pulling ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. On Nov. 12, 2014, a European spacecraft named Philae landed on Comet 67P. To say it was a bumpy ...

Jason has written about technology for more than 25 years - first in the gaming press, then focusing on enthusiast PCs and general technology. He enjoys learning how complicated technology works and ...

Cancer pain has many different causes and there are different types. You can have pain control and get support to help you manage any pain you might have. Most cancer pain is caused by the tumour ...

Standing ab exercises build functional strength, stability, and balance that protect your spine and help you move more effectively in everyday life. They torch calories, train multiple muscles ...

Abstract: This paper presents a novel discrete-time sliding mode control (DSMC) strategy integrated with model-free adaptive control (MFAC) to enhance tracking performance and robustness. Unlike ...

Abstract: For the trajectory tracking problem of second-order nonlinear uncertain systems, this paper proposes a new adaptive nonsingular terminal sliding-mode control method. A novel sliding variable ...

Cosmonauts Sergey Ryzhikov and Alexey Zubritsky will conduct a spacewalk outside the International Space Station today (Oct. 28), and you can watch the action live.