That's a total ... organ: skin. It reproduces about 30,000 to 40,000 cells every minute. That means we shed a whole layer of outer skin every two to four weeks, or 1,000 bodies worth in a lifetime.

Narrator: In 1954, doctors successfully transplanted the first human organ ... cost a total of more than $8 billion, and that's just for kidneys. Factor in the 15,000 other organs transplanted ...

Levels of microplastics in the brain have shot up 50% in just eight years, according to samples tested by researchers in New ...