There's still much work to be done but for years engineers and historians have marvelled at how Roman concrete works have stood the test of time for nearly two millennia, especially those poured during the imperial reign of Augustus Caesar (63 BC to AD 14). Dr. Marie Jackson of the University of California, Berkeley, civil and environmental engineering department, is part of a team working to understand what makes Roman concrete so resilient both in terms of structures, building seawalls and other waterfront structures.