Do you (still) love physics? Then, join us! We discuss everything: time travel, ferrofluids, why π=80, why g~π2, relativistic sex, planetary tango, knots, pervert maths, robots, puzzles… You can’t miss this!
Maybe the star of this blog are the scitoys, which are demonstration programs for physics and math… Click here to see all of them…
Physics Napkins 
Hello.My name is Vick. I am a student of science institute in Taiwan and major in knot theory.I need to draw all kinds of knot diagram.So,I am interested in your program-Xknots.But when I download,I can’t set up it.Please help me how to set up it?TKS.