Natural selection uses duplicated genes as raw material for functional innovation, co-opting their existing features to new functions. Understanding genetic innovation requires two questions to be ...

Abstract: We study stability and robustness for a large class of linear time-varying systems under the assumption that the system possesses some kind of excitation which is necessary for uniform ...

Difficulty focusing isn’t always ADHD. Attention problems can stem from sleep, stress, mental health, or medical factors.

The removal of advanced data from a popular internet resource has proven unpopular – The Athletic breaks down what happened ...

Evaluate stocks without dividend payouts using P/E ratios, earnings growth, and book value. Learn strategies for identifying valuable investment opportunities.

A self-described "little farm girl" in the Jim Crow Era, Gladys West's complex and pioneering work for the U.S. Navy helped ...