Twins

A years-long study of more than 2,000 pairs of twins found that alcohol misuse may lead to a variety of health issues and dissatisfaction

A first-of-its kind study of twins finds those who live in states where marijuana is legal use it 24 percent more

The Twins Study provides the first integrated biomolecular view into how the human body responds to the spaceflight environment

If one egg is fertilized by two sperm it results in three sets of chromosomes, one from the mother and two from the father

The findings indicate that genes are not the sole determiner of fitness

Identical twin astronauts are subjects of NASA’s Twins Study. One spent a year in space while the other stayed on Earth as a control subject