Underground system discovered 30 years ago, then sealed up again MEXICO CITY - Archaeologists are opening a cave sealed for more than 30 years deep beneath a Mexican pyramid to look for clues about the mysterious collapse of one of ancient civilization's largest cities.

The Valley of the Kings is a valley in Egypt where for a period of nearly 500 years from the 16th to 11th century BC, tombs were constructed for the kings and powerful nobles of the New Kingdom  The valley stands on the west bank of the Nile, across from Luxor, The wadi consists of two valleys, East Valley (where the majority of the royal tombs situated) and West Valley.

Soon after hearing news reports of the tsunami that devastated coastal regions throughout the Indian Ocean, research geophysicist Steven Ward, an expert on tsunami hazards, went to work on his computer.

Scientists from Durham University will use robots to explore the depths of the Atlantic Ocean to study the growth of underwater volcanoes that build the Earth's crust.The ISIS robot which will be used by scientists to collect rock samples from volcanoes on the Mid-Atlantic Ridge two miles (3km) below the surface of the sea. (Credit: Photograph courtesy of the Natural Environment Research Council)