Astronomers have discovered the most tenuous molecular gas ever observed. They detected the absorption of radio waves by gas clouds in front of bright radio sources. This radio shadow revealed the ...

In 1816, René Laennec was confronted with a young woman “laboring under general symptoms of diseased heart, and in whose case percussion and the application of the hand were of little avail on account ...

Not every connection is strong, and not every argument rests on solid ground. The word tenuous is often used to describe things that appear weak, slight, or lacking firmness. It may refer to a fragile ...