What famous Chinese landmark began construction around 221 BC under Qin Shi Huang?

Great Wall of China

Who was Achilles' close companion whose death spurred Achilles back into battle? Who was the king who built the first temple in Jerusalem? What term refers to animals that lay eggs with shells? What early American rebellion in 1794 protested against excise taxes primarily on whiskey? Who opened the nation’s first birth control clinic in Brooklyn in 1916?