August 11th, 2017 | 1 hr 1 min
aurora, convection zone, fusion, helium, hydrogen, magnetic field, main sequence, red giant, solar flare, solar wind, star, sun
What is the Sun?
May 5th, 2017 | 57 mins 21 secs
air, atmosphere, boiling, elon musk, greenhouse, magnetic field, oxygen, ozone, photosynthesis, pressure, solar flare, stromatolite
What is the atmosphere?