-
Period: 4500 BCE to 10 BCE
Stone
We have known the stone since 4,000,000BC -
Period: 4500 BCE to 10 BCE
Bow & Arrow
We have known the bow and arrows since 30,000BC -
Period: 4 BCE to 500
Abacus
We have known the abacus since 2500BC -
Period: 500 to 1500
Paper
We have known about paper since 100AD -
Period: 500 to 1500
Horseshoe
We have known the horseshoe since 770AD -
Period: 500 to 1500
Gunpowder
We have known the gunpowder for 1240AD -
Period: 500 to 1500
Printing Press
We have known the printing press since 1459AD -
Period: to
First Computer
We have known the first computer (ENIAC) since 1947 -
Period: to
Fibre Optics
We have known the fibre optics since 1955 -
Period: to
LED diodide
We have known the LED diodide since 19622 -
Period: to
Arpanet
We have known the arpanet since 1969 -
Period: to
Email
We have known the email since 1971 -
Period: to
Mobile Phone
We have known the mobile phone since 1973 -
Period: to
Nuclear Reactor
We have known the nuclear reactor since 1942 -
Period: to
New Horizons spacecraft reaches Pluto
We have known the New Horizons spacecraft reaches Pluto since 2015