Physicists thought they had a solid grasp on what made up matter. They knew that atoms contained electrons surrounding a positively charged nucleus. They also knew that each nucleus contained a number of protons and positively charged particles. Combinations of those two particles made up all of the matter in the universe.
PTELook at the text below. In 35 seconds, you must read this text aloud as naturally and clearly as possible. You have 35 seconds to read aloud.
Recorded Answer
Current status:
Beginning in 35 seconds.