In two-legged humans, the lumbar spine mostly carries the weight of the upper body ... bone loss, the dosage is much, much higher, equivalent to about 13 years of living on board the ISS. Unlike ...

What emerges, a few weeks later, is a replacement part that not only fits the patient’s bone exactly but is made out of the patient’s own cells. Nina Tandon of EpiBone plans to begin human ...

What Is the Nervous System? Your nervous system is your body's main communication system. It sends messages from your brain to the rest of your body and helps you respond to changes inside and ...