Scientists have long wondered why life exclusively uses left-handed amino acids, and a groundbreaking NASA study has just made this puzzle even more intriguing. In a surprising twist, researchers ...

that the DNA molecule exists in the form of a three-dimensional double helix. More than 50 years passed before the significance of Miescher's discovery of nucleic acids was widely appreciated by ...

In the late nineteenth century, a German biochemist found the nucleic acids, long-chain polymers ... many proteins take the shape of an alpha helix, spiraled like a spring coil.