Think, if you were asleep for as long as 40,000 years and then suddenly woke up. How would you feel Disoriented ..Well, biologists in Russia have done something similar with worms that have been frozen in time since the Pleistocene ice age. Read about it in todays lead story along with its implications on the future.   The special feature today is about the Great Explorers of all time and World Architectural Wonders features Burj Khalifa.   With exams approaching, trick of the week is back. Hoping youll have a few tricks up your sleeve, when you write your papers. - Shivani aunty