Today, in exchange for knowledge about Special and General Relativity of physics, i taught Weiliang about photosynthesis and how a camera sensor works. He seems rather interested in the Electron Transport Chain (I was tempted to tell him about RUBISCO, just because its so cool xD).
P.S. If wormholes really existed, then SBS, SMRT, Comfort etc are going bust. Especially SBS, since its so unreliable anyway.. lol