Just like humans, chimps have rhythm when drumming, which suggests that the trait evolved in our common ancestor ...

They are the building blocks of life, performing a wide range of functions within ... (click on image to enlarge) (Image: National Human Genom Research Institute) Proteins are built from a set of 20 ...

"Supply and demand" constraints limit the body's ability to produce the various proteins needed for critical life functions, ...

Researchers have found more than 20 different amino acids, the building blocks of life ... of amino acids make up proteins found in the human body. Of these amino acids, isoleucine and valine ...