A very specific kind of brain cell dies off in people with Parkinson’s

Deep in the human brain, a very specific kind of cell dies during Parkinson’s disease. For the first time, researchers have sorted large numbers of human brain cells in the substantia nigra into 10 distinct types. Just one is especially vulnerable in Parkinson’s disease, the team reports May 5 in Nature Neuroscience. The result could ... Read more

Joggers naturally pace themselves to conserve energy even on short runs

For many recreational runners, taking a jog is a fun way to stay fit and burn calories. But it turns out an individual has a tendency to settle into the same, comfortable pace on short and long runs — and that pace is the one that minimizes their body’s energy use over a given distance. ... Read more

All of the bases in DNA and RNA have now been found in meteorites

More of the ingredients for life have been found in meteorites. Space rocks that fell to Earth within the last century contain the five bases that store information in DNA and RNA, scientists report April 26 in Nature Communications. These “nucleobases” — adenine, guanine, cytosine, thymine and uracil — combine with sugars and phosphates to ... Read more