It's no revelation that the human body undergoes natural wear and tear as we age. But you might be surprised that this ...

Your heart and lungs work together to pump blood throughout your body. Oxygen rich blood from ... through your lungs because of the pressure inside these vessels. As a result, the lower chamber ...

It was an eight-day mission that turned into nine months. This is what Sunita Williams and Barry Wilmore survived The human body could never survive space. Our blood, bile and tears would start ...