In the atmosphere, at an altitude of about 20 to 30 kilometers, the ozone layer protects us from carcinogenic UV rays. But on earth, on the ground, ozone is a problem. Here, the colorless and toxic gas harms people and the environment. More about ozone: http://www.umweltbundesamt.de/ozon Transla
Learn about the Mars Atmosphere and Volatile EvolutioN (MAVEN) mission to Mars in this video from NASA's Goddard Space Flight Center. Mars does not have a global magnetic field like Earth but does have patches of magnetic fields. Scientists use magnetometers to study the planet's magnetic anomalies.
How much of someone else's pee could you be swallowing while taking a swim? And is it dangerous? This week, Risk Bites takes on the terribly important topic of peeing in swimming pools. Surprisingly, beyond the yuck factor of drinking someone else's urine, there is a more serious hazard -- produc
Learn the basics about how atoms bond when learning about the structure of atoms. Bonds form by the attraction of negatively charged electrons and the positive nucleus of atoms. Atoms have a positively charged tiny nucleus which contains almost all the atom’s mass, surrounded by shells of negativel
