v. get to know or become aware of, usually accidentally; "I learned that she has two grown-up children"; "I see that you have been promoted"

v. identify as in botany or biology, for example

v. make a discovery; "She found that he had lied to her"; "The story is false, so far as I can discover"

v. make a discovery, make a new finding; "Roentgen discovered X-rays"; "Physicists believe they found a new elementary particle"