Top Network Posts
- 69Why can we see the dust particles in a narrow beam of light (and not in an all lighted area)?
- 52How can the Earth keep spinning with a liquid core?
- 37Why are a motorcycle's front brakes more effective than back?
- 31Do gravitational lenses have a focus point?
- 25Why do prisms work (why is refraction frequency dependent)?
- 23Do low frequency sounds really carry longer distances?
- 22Why doesn't light kill me?
- View more network posts →