History of the Universe eBook. 398 pages, 300 illustrations only £5.99
DatesIn this website we show dates in the following formats. ya means "years ago". kya means "thousand years ago". K stands for kilo, the scientific name for thousand. mya means "million years ago". A million is one thousand thousand. bya means "billion years ago". One billion is one thousand million. Note that geologists sometimes use the term Ga, meaning "giga-years ago", where giga is the scientific name for billion.
History of the Universe eBook. 398 pages, 300 illustrations only £5.99 |
eBook only £5.99 398 pages, 300 images "I find the science fabulous...an extremely useful teaching tool." Professor David Christian. Follow @WykenSeagrave |