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Why is the Mediterranean Sea Blue?
We know that about seventy one per cent of the earth’s surface is covered with water. The earth’s three main Oceans are the Atlantic, the Pacific and the Indian Ocean. The Atlantic Ocean is a great mass of water that separates Europe and Africa from America. It is shaped like a great hour-glass-with a ‘waist’ where Africa and South America bulge out towards each other. Although in area it is less than half the Pacific, it has many ‘secondary’ seas, such as the Arctic Ocean and the Mediterranean Sea....
What is an Earthquake?
One moment, the world seems just the way it was yesterday, the day before, last year, or even the day before the day before. All is well with the world. It’s a beautiful sunny day and you are sitting drinking your morning tea or coffee relaxed and enjoying the day. Suddenly there is a rattling of plates and glasses. Within seconds chairs and tables are rocking violently, the fans sway crazily and crockery is falling off the shelves....
Rocky Planet of Fire and Ice
Would you believe it? The soft sand that we sink into on the beach is actually rock? Sand is what a rock becomes after years of being worn down by rivers. Years of sea waves crashing against huge rocks and cliffs makes rocks break into small particles. And ultimately, they end up as sand. The colours of sands — yellow, red, grey, black — depend on the kind of rock it comes from. Sometimes desert sand is carried by winds across great distances, to seasides, increasing the amount of sand in the sea....
Joining Hands for peace, at Hiroshima
Every year, on August 6 and 9, a peace memorial conference is held in Hiroshima and Nagasaki. Thousands of people from all over the world gather there to indicate their support for peace in a world that is free of nuclear weapons. Dr Srimanjari, who teaches History at Miranda House, Delhi University, took part in one such conference, in 1998. She shares her experience, saying that the visit was a real eye-opener for her. How does one talk about peace?...
The Baby Current Which Destroys
Did you know that the period between November 1997 and November 1998 was the hottest year recorded on earth? In fact, six of the first eight months of the year were the warmest since humans began recording temperatures on earth in 1866. Weather experts say one of the causes behind the warming of the earth’s atmosphere, or global warming, is El Nino, a water current in the Pacific Ocean. But why should a water current create heat in the earth’s atmosphere, one would ask....
Death Threat
March 19: The Olive Ridleys are olive-green coloured sea-turtles that have existed for more than 200 million years. The Gahirmatha beach in Orissa is one of their nesting sites, but unfortunately the fishermen have started catching these turtles for meat to sell in the local market. This has alarmed environmentalists. Nature lover and scientist, BR Ray says that this trend will surely lead to the extinction of the turtles. Thousands of female ridleys travel thousands of kilometres to lay their eggs at Gahirmatha beach....
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