Ionising radiation, such as gamma rays, X-rays and radioactive particles can cause cancer by damaging DNA. However, how this happens, or how many tumours are caused by radiationdamagehas not been known. Previous work on cancer had revealed that DNA damage often leaves a molecular fingerprint, ...
therefore the energy E must be released and be carried away by the particle Long distance space probes require a nuclear power cell however if the activity is high to give high power then the source will not last very long. Voyager has a power output of about 285W!
Cosmic rays in action. The main findings in the new Svensmark paper concern the uppermost stellar band, the green band of living things and, on the right, atmospheric chemistry. Although solar modulation of galactic cosmic rays is important to us on short timescales, its effects are smaller and...