discover (v): to be the first person to find something important. discoverer (n): someone who is the first person to find something important. discovery (n): something that has been discovered.

invent (v): to design or create something that has never existed before. inventor (n): someone who designs and makes new things. invention (n): something that has been designed or created for the first time.

Examples: He discovered a new continent. His discovery was the law of gravity. The inventor of the electric light bulb is Thomas Edison.

the first practical telephone the first mechanical computer the first powerful telescope phonograph powered aircraft

electric light bulb, phonograph, motion picture camera powered aircraft water screw the first mechanical computer the first practical telephone electricity a powerful telescope, an improved compass

Present Continuous Tense I am doing an experiment now. She is using test tubes to observe different chemical reactions. They are looking into the sky through a telescope at the moment. We are making a model wind turbine at present.