New Delhi: In 2016, when geologist Rajiv Nigam visited the UNESCO World Heritage site of Dholavira, it was the 18-metre-thick wall around the citadel that piqued his curiosity the most. What could ...

"How to survive a tsunami’s catastrophic force and aftermath. How to Survive is a Webby Award-winning series offering expert tips for surviving disasters, attacks, and life's toughest situations.

WELLINGTON, New Zealand (AP) — A tsunami warning has been issued for Papua New Guinea after a strong magnitude 6.9 earthquake, according to the U.S. Geological Survey. The quake was shallow ...