what do you find most interesting about physics?

Question: what do you find most interesting about physics?

Asked by beckymaskill to Mark on 22 Jun 2010 in Categories: Your Research.
- Mark Lancaster answered on 22 Jun 2010:
  
  That from very simple ideas it can explain almost everything – how we got from a nanosecond after the Big Bang to forming the earth; how the earth and climate works; what underpins chemistry (thermodynamics and quantum mechanics) – you can go a long way with just conservation of energy, momentum and quantisation ….

Question: what do you find most interesting about physics?