Heidi Klum never ceases to amaze. At 51, she proves once again that age is just a number and that self-confidence has no ...

Enzymes are proteins – large molecules that do the behind-the-scenes work that keep all living things alive. These proteins are made up of amino acids, a set of building blocks that can be stitched ...

During a news conference in the Oval Office, X was picking his nose, mimicking his father and telling the press to "shhh" as his father was speaking.