How do astronauts �walk� in space?
An astronaut cannot walk the
ordinary way once he/she leaves his spacecraft during a journey. All round
is nothing but empty space. There is not even any gravity to pull him/her in
particular direction. So when astronauts do leave their spacecraft during a
flight-perhaps to help in docking operation with another spacecraft--they
carry specially designed hand rockets with them. If they point the rocket
exhaust in one direction, and give the engine a burst of power, they will
move in the opposite direction. They can steer themselves this way.
* 90 people die every hour in
India because of cancer caused by tobacco consumption. About 15 million
tobacco consumers are suffering from fatal lung and oral cancer. By 2010
the number could reach 30 million, if uncontrolled.
* 80 per cent of the beggars in
Saudi Arabia during the month of Ramadan are non-Saudis. A 50 per cent
increase has been noted in the number of beggars during the holy month.
Many of them use mobile phones to communicate with each other.
* 4.52 kilos of hydrocarbons,
31.25 kilos of carbon monoxide and 2.45 kilos of nitrogen oxide will not
pollute the environment if a single person decides to use public
transportation for a year instead of driving to work.
* 7 billion people in 60 countries will face
water scarcity by the middle of this century, according to a worst-cast
scenario. At best, the number will be 2 billion in 48 countries, depending
on the factors like population growth, policy-making and climate change.
