Antigravity devices, inertia cancellors, cure for cancer
Because he needed to use the bathroom.
he was too fat too walk up stairs and needed an easier way to do it
what did Obama invent
Roberts helped to invent the microwave, but did not invent it by himself.
What did William armstrong invent ????????
they needed to
Because they needed heat and people get bored so they invent items that make popcorn
The internal combustion engine.
Questions needed a place to be answered
they invented maths because the needed to some how figure out the ways of life. they invented the alphabet because the needed to send messages to each other.
Because he needed to use the bathroom.
because the people needed a upgrade
because he needed to learn
The roman empire dedided that they needed a number system
No, the Greeks did not invent the train. They knew of steam power, but lacked the advanced technology and the materials know-how needed to come up with a train.
because they felt like someone needed more technology
He probably just needed something to carry his books with