Do You Know?

1) What is Deja vu ?---I
Deja vu is the peculiar feeling that a place,situation,person,action or conversation is familiar and has already been experienced.Occasionally deja vu is accompanied with precognition.Some theorists believe that deja vu is information that is received in dream stateand recognised or retrievedagain on coming upon the actual person,place or event.

2)What is the famous American SETI project?
SETI is search for Extraterrestrial Intelligencegroup located in Berkeley, CA.They have been searching for other life for more than 40 years.The project is dedicated to the search for Radio Signalsfrom space indicating the existence of Lifebeyond that of Earth's.

3)What makes tsunami such a deadly wave?
What makes tsunami so deadly is the amount of water they move and the speed they travel..A normal wave usually created by wind only affects the top 30 feet of the ocean and moves slowly.In a tsunami the entire section of the oceanfrom top to bottom rushes away from the quake site at nearly 800 kilo meters per hour.Furthermore it travels so stealthily that if one were to sit in a boat on the open ocean and it passed underneath ,one might not even notice it.

4)Why is sky blue?
Sunlight,which appears white to the human eye is infact a mixture of all the seven colours of the Rainbow (VIBGYOR).When the sunlight passes thro'the atmosphere,it scatters and spreads in all directions.The blue component of the sunlight is scattered more strongly than other components and hence the sky appears blue.

5)Why can't you tickle yourself?
The answer lies at the back of the brain in an area called cerebellum which is involved in monitoring movements.When you try to tickle yourself,the cerebellum predicts the sensation and this prediction is used to cancel the response of other brain areas to the tickle.

Compiled by Baiyu Mumbai 20 March 2009