On average, we breath around 20 times per minute, every minute and every hour, day, week, month and year of our lives. It is one of the first things we do immediately after birth and one of the last ...

Red blood cells carry oxygen from the lungs to every other organ, and blood-forming stem cells must make about 200 billion new red blood cells each day to keep the oxygen flowing. For many years, ...

Researchers in China placed a lung from a genetically modified pig into a brain-dead man, with mixed results. By Roni Caryn Rabin Scientists have dreamed for centuries about using animal organs to ...