roughly 11000 years.
150
Subways have been around for over 150 years, with the first underground railway, the London Underground, opening in 1863. Since then, many cities worldwide have developed their own subway systems, enhancing urban transit. Today, subways serve as a vital mode of transportation in densely populated areas.
40 years
It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.It was originally finished in 1933. Since then many changes have been made. New buildings have been added, including theatres, cinemas, an underground market and a sky scraper.
millions of years, if you're referring to oil/natural gas/coal made from dead plants and animals that have been compressed and heated underground. Swamps and bogs were main sources of this.
There are many rivers that have been pushed underground in London.
No way of telling, depends on the chemical properties of the soil.
Easily- many mines have people in them around the clock for years.
How many years have there been since 1776?
how many years has it been since 1997
Slavery started many thousands of years ago, it was a worldwide occurrence. The underground rail road was an escape route for slaves in the US
they have been out 61 years