Evolution

The book I read to research this post was Evolution A Very Short Introduction by Brian Charlesworth which is a very good book which I bought from kindle. This books tells you all about evolution and how DNA is made up so that you get significent differences in the genetics of an animal or other living thing in roughly 1 in 100,000 and in the wild most of these would die but in some cases they would have enhancements and would become more successful and the species would evolve. An example is on the Galapagos Islands if there is a drought plants that produce small seeds stop producing them to save water but plants that produce a small amount of big seeds still produce them. As a result temporarily birds evolve deep big beaks but once the drought finishes they gradually go back to normal. In rats many have been exterminated by warfarin which is a rat poison. They have developed a tolerance in some to this but they also had stunted growth if they were immune but now appear to have changed genetically in many cases to get around. Warfarin works by preventing the blood from clotting and affects vitamin k platelets in their blood. Evolution of course was discovered by Darwin & an interesting point is there is probably life on other planets in other solar systems. The sun is a fairly typical star of which there are billions of a similiar type in our galaxy and there are billions of galaxies in our universe.