DENVER, Colorado, April 10 -- The University of Colorado issued the following news: * * * CU Denver Students are Helping Make Castles More Accessible Ireland's largest castle boasts 20 sides, three-meter-thick walls, and the remains of what was once a moat. The Trim Castle, which dates to 1172 and took 30 years to build, is often referred to as one of the country's most impressive medieval structures (you may even recognize it from some of the scenes in Braveheart). And while the castle is a   more

MUNICH, Germany, April 10 -- The Max Planck Society issued the following news: * * * The green past of the Saharo-Arabian Desert Isotope analyses of limestone cave deposits reveal recurrent humid intervals in the Saharo-Arabian Desert over the last eight million years. * Dripstones reveal: The Saharo-Arabian Desert experienced repeated wetter periods over the past eight million years. * Life-friendly desert: Wetter conditions favoured the exchange of mammals between Africa and Eurasia. * L  more