The Chemistry of Snowflakes

http://youtu.be/VYrF3sFBY20 The video tracks formation of snowflakes from their origins in bits of dust in clouds that become droplets of water falling to Earth. When the droplets cool, six crystal faces form because water molecules bond in hexagonal networks when they freeze. It explains that ice crystals grow fastest at the corners between the faces, […]

Sleep-deprived astronauts turn to the red, white and blue

NASA is planning to test an $11.2 million lighting system to try to better regulate astronaut’s body clocks. The technology could help studies into sleeping problems back on earth. The idea is to tackle the problem that natural light doesn’t follow usual patterns when you are in orbit. That means astronauts don’t sleep as much […]