We still have Bronze, Iron, Industry, Machinery, Atomic technology, Space technology... The so-called "ages" are named for what is new within them, there's no

We still have Bronze, Iron, Industry, Machinery, Atomic technology, Space technology... The so-called "ages" are named for what is new within them, there's no implication that the technology is lost when the next supposed "age" starts. We're usually now referred to as being in the Information age, which puts the Space age in the past.