InfoStunner

Eras Age In millions of years Periods Geographical Conditions Azoic Proterozoic 4700 3000 Pre-Cambrian Origin of the earth From the formation of the earth: barren landscapes, torrential rain, several ice ages, the beginning of life. Palaeozoic (Ancient Life) 570 Cambrian After Cambria, the roman name for Wales Shallow seas, advancing and retreating. Volcanoes in Wales and Europe generally. Warm Climate 500 Ordovician After Ordovices, a Celtic tribe Seas advance and retreat. Volcanic activity, warm climate. First animals with backbones 440 Silurian After Silures, a Celtic tribe Fluctuations of sea level. First evidence of new mountains being formed. First land plants 395 Devonian After the English count of Devon Mountain building in north, west Europe and North America. Plants become abundant as do fishes. First amphibians 345 Carboniferous From the existence of coal seams Shallow seas a...

Bobby Fischer is considered by many to be the greatest chess player who ever lived. In this particular simultaneous exhibition, he won 47 of the matches, drew 2 and lost 1. He lost to Donn Rogosin, not a well-known player. Fischer was 21 in this picture. He is playing white, that’s a big advantage in high-level chess. You can choose an opening that you know well and your opponent doesn’t know well. Basically, you get decide which direction the game’s going to go for the first few turns. Openings are by the book so to speak, but there are variations and choices you can make. This is especially obvious in gambit style openings where you offer to sacrifice a piece for position, here the opponent can choose to take it or not. So there is a lot to know even if the best moves in a given position are known. But grand masters will know most of these of course and a lot of preparation goes into finding answers to the opening you expect from your opponent. After only 4 moves, there a...