Nettie Stevens and Edmund Beecher Wilson independently discovered the chromosomal XY sex-determination system (that males have XY and females have XX sex chromosomes).
Health refers to physical, mental, and social well-being. It’s a broad category that contains fitness and exercise, nutrition, health science, and mental health.
Tripping is slang “for having a psychedelic experience”. Tripping isn’t a drug, it is a state of mind that some psychedelic drugs let us access.