It has a high-income economy and has a "very high" Human Development Index, ranking 16th in the world.It was the first industrialised country and the world's foremost power during the 19th and early 20th centuries.Five-sixths of Ireland seceded from the UK in 1922, leaving the present formulation of the United Kingdom of Great Britain and Northern Ireland.
The term "United Kingdom" is found in informal use during the 18th century and the country was also occasionally referred to as the "United Kingdom of Great Britain" though its full official name, from 1707 to 1800, was merely "Great Britain", without a "long form".
The Acts of Union 1800 united the Kingdom of Great Britain and the Kingdom of Ireland in 1801, forming the United Kingdom of Great Britain and Ireland.
► Limpet size reductions over the last 8200 years show no correlation to environmental changes; human population growth and increasing predation pressure appear to be primarily responsible.
► Native Americans impacted Channel Island shellfish stocks over millennia; for fisheries manager's archaeological data can help solve the “shifting baselines” problem.
British influence can be observed in the language, culture and legal systems of many of its former colonies.
The UK is a developed country and has the world's sixth-largest economy by nominal GDP and ninth-largest economy by purchasing power parity.
Fluctuations in limpet size show no clear correlation with changes in sea surface temperature and marine productivity, suggesting that increased predation by growing human populations was primarily responsible for the reduction in size over time.
Our results provide further evidence that prehistoric peoples significantly influenced nearshore fisheries long before the development of the commercial and industrialized fisheries of historic times.► Size changes in the owl limpet (Lottia gigantea) through 10,000 years are examined.
The UK consists of four countries—England, Scotland, Wales and Northern Ireland.