Topic Details (Notes format)

Who discovered exoplanets?

Which ancient empire built the rock-cut city of Petra in Jordan?

Which inventor is known for the phonograph and practical electric light bulb improvements?

Which organ in the human body produces bile to aid in fat digestion?

Which star is at the center of our solar system?

Which part of the human eye controls the amount of light entering?

Which element has the chemical symbol "Ti"?

Which is the largest bone in the human body?

Who discovered the first gravitational lens?

Which element has the chemical symbol "Es"?