two chinese astronauts in blue flight suits move a white radiation-exposure experiment through the interior of china's tiangong space station China is running a biological radiation exposure ...

Chinsese astronauts are conducting experiments with fruit flies and more aboard the Tiangong space station. Credit: China ...

Chinese astronauts conducted a daring experiment aboard the country's Tiangong space station by lighting a candle, a move that's banned aboard the International Space Station.

The Chinese experiment has gotten some play in that country's media, but it received no promotion from NASA or SpaceX during the run-up to Saturday's launch.