Hacker News
- Fun Fact: It can take a photon a million years after being emitted in the core of the sun to escape at the surface. This is basiclly because it bounces off so much matter deep inside the sun that by doing a random drunkards walk (the scientific term) it eventual gets out. http://image.gsfc.nasa.gov/poetry/ask/a11354.html 8 comments space
- How does Venus maintain such a thick atmosphere without a magnetic field? http://image.gsfc.nasa.gov/poetry/venus/V3.html 35 comments askscience