Madison: During the last prolonged warm spell on Earth, the oceans were at least four meters – and possibly as much as 6.5 meters, or about 20 feet – higher than they are now.

Salt lake: When lions and tigers roar loudly and deeply – terrifying every creature within earshot – they are somewhat like human babies crying for attention, although their voices are much deeper.

Knoxville: Some people may consider them pests, but ants are key to many plants’ survival.

Huntsville: March was similar to February, in that warm and cold areas balanced each other in the tropics and Southern Hemisphere, according to Dr. John Christy, a professor of atmospheric science and director of the Earth System Science Center at The University of Alabama in Huntsville.

Adelaide: University of Adelaide researchers are leading an international project to help identify buildings most vulnerable to earthquakes and the best ways to strengthen them.

Salt Lake City: Climate change spells trouble for many tropical birds – especially those living in mountains, coastal forests and relatively small areas – and the damage will be compounded by other threats like habitat loss, disease and competition among species.