There are twelve Federal Reserve Districts in the United States. Number 1 is in Boston and covers the New England states, while number 12 is in San Francisco and covers the Western states, including Alaska and Hawaii. Source(s): http://www.federalreserve.gov/otherfrb.h... Sailinlove Â· 1 decade ago.
Layers in glaciers show a history much longer than 10,000 years, and radiometric dating places the formation of the Earth at 4.5 billion years. Light from galaxies is reaching us billions of years after it left, and the expansion rate of the universe dates its age to 13.7 billion years.
How do scientists figure out Earthâs age? In the early part of the 20th century, scientists still werenât sure how old Earth is. Nowadays, scientists use radiometric dating of various sorts of rock â both earthly and extraterrestrial â to pinpoint Earthâs age. Many great thinkers throughout history have tried to figure out Earthâs age.