Tag: Change

Allied bombing raids during the second world war inadvertently experimented on the weather by producing huge contrails over south-east England. A study of one 1944 raid offers a rare opportunity to check our models of how contrails change temperatures.

After listening to a radio programme in which an elderly woman recalled seeing a wartime sky "turn white with clouds" as fleets of bombers took off, Roger Timmis of Lancaster Environment Centre in the UK realised that the planes could have affected the weather.

ScienceDaily (Jan. 3, 2010) Scientists from The Scripps Research Institute have determined for the first time that prions, bits of infectious protein devoid of DNA or RNA that can cause fatal neurodegenerative disease, are capable of Darwinian evolution.

The study from Scripps Florida in Jupiter shows that prions can develop large numbers of mutations at the protein level and, through natural selection, these mutations can eventually bring about such evolutionary adaptations as drug resistance, a phenomenon previously known to occur only in bacteria and viruses. These breakthrough findings also suggest that the normal prion protein -- which occurs naturally in human cells -- may prove to be a more effective therapeutic target than its abnormal toxic relation.