When people are dropped into the most dangerous of conditions – as when disaster strikes, or during exploration of another ...
Almost exactly 200 years ago, French physicist Sadi Carnot determined the maximum efficiency of heat engines. The Carnot ...
Astronomers have obtained the sharpest-ever X-ray spectrum of an iconic active galaxy, providing the most accurate, precise ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback