Step back into the recent past and discover the moments that defined the modern world. The century took off with the Wright brothers' historic flight, then swung between two devastating world wars, while people's revolutions around the globe shook up society and transformed politics. Discover how the Russian Revolution overthrew the tsars, the Cold War split Europe, suffragettes won the right for women to vote, Nelson Mandela became South Africa's...

Deep below the deceptively beautiful waters of the Atlantic Ocean, guarded by hundreds of dolphins, lie the astonishing remains of a mysterious lost city much like the legendary Atlantis. While mapping the ancient underwater metropolis of Marinth, marine architect Hannah Bryson makes a shocking discovery: She may have finally uncovered the truth about the once-glorious city's mysterious demise. Marinth's sudden disappearance has confounded scientists...