You can see the introduction to this series here. In this post we examine the evidence that mitochondria and chloroplasts are the descendants of free-living bacteria that entered into mutualistic relationships with eukaryotic host cells.
For the town of the same name in New South Wales, Australia, see Seaham, New South Wales. Seaham, formerly Seaham Harbour, is a small town in County Durham, situated 6 miles (9.7 km) south of Sunderland and 13 miles (21 km) east of Durham. It has a small parish church, St Mary the Virgin, with a late 7th century Anglo Saxon nave resembling the church at Escomb in many respects.
Egham predates 666 AD when Chertsey Abbey was founded with many square miles of land, which included that of Ecga's Ham, one of the very oldest surviving charters (detailed records) of the country. Egham appears in Domesday Book of 1086 as Egeham.