Precursors of Copernicus' heliocentric theory(johncarlosbaez.wordpress.com)47 points by chmaynard 1 year ago | 16 comments
Polycyclic Aromatic Hydrocarbons(johncarlosbaez.wordpress.com)25 points by chmaynard 1 year ago | 3 comments
The Triassic-Jurassic Extinction(johncarlosbaez.wordpress.com)42 points by chmaynard 3 years ago | 36 comments