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Giant ripples under Louisiana are evidence of the dinosaur-killing asteroid impact

Arboretum showcasing educational games designed by grad students

City promotes natural biodiversity with wildflower program

Study finds mass extinctions of Earth's land animals follow a cycle -- Science & Technology -- Sott.net

© NASA/Donald E. Davis An artist s impression of a giant space rock slamming into Earth 65 million years ago near what is now Mexico s Yucatan Peninsula. A consortium of scientists now says this was indeed what caused the end of the Age of Dinosaurs. Asteroids aren t completely random? Mass extinctions of life on Earth appear to follow a regular pattern, a new study suggests. In fact, widespread die-offs of land-dwelling animals - which include amphibians, reptiles, mammals and birds - follow a cycle of about 27 million years, the study reports. The study also said these mass extinctions coincide with major asteroid impacts and devastating volcanic outpourings of lava.