He was waiting for the bus at the corner
"Then" is used in an "if-then" scenario, to dictate chronological order. In other words, "If you jump off, then you will fall," or "he was attacked and then retreated."
"Than" is used for comparisons. In other words, "The egg was bigger than the pea," or "I'm stronger than you."
Compass needles follow the Earth’s magnetic field and what would be considered the planet’s magnetic North Pole doesn’t match the the planet’s geological North Pole. As the Earth’s magnetic field changes, it’s magnetic North Pole shifts with it.
