The Internet Archive discovers and captures web pages through many different web crawls.
At any given time several distinct crawls are running, some for months, and some every day or longer.
View the web archive through the Wayback Machine.
Web wide crawl with initial seedlist and crawler configuration from October 2010
TIMESTAMPS
The Wayback Machine - https://web.archive.org/web/20110106210332/http://www.searchengineoptimising.com/glossary/glossary-of-computer-and-internet-terms/terabyte
A Terabyte can be expressed as 2 to the 40th power, or 1,099,511,627,776 bytes. It is used as a single unit of measurement, a 500GB hard drive would only contain half a terabyte of space.