Here are some different ways that might help you envision the enormousness of 7 billion:
— Seven billion seconds ago, the year was 1789. That was the year George Washington was inaugurated as the first U.S. president and Congress met for the very first time.
— If you took 7 billion steps along the Earth’s equator — at 2 feet per step — you could walk around the world at least 106 times.
— Suppose an average thimble holds 2 milliliters of water. Seven billion of those thimbles would fill at least five Olympic-sized swimming pools….