Christine Bailey

Latest Articles

Who invented smart medication reminders?

Who invented cognitive training apps?

What is the oldest type of engine?

Who invented the wax seal?

What was Baird's first television called?

How did Thomas Edison's invention change America?

What are the weaknesses of the cotton gin?

What did the U.S. government invent?

Who came up with the zebra crossing?

Who designed the emergency exit sign?