Wednesday, July 4, 2012
world population by 1801:
In 1801, when the first complete world census was carried out, the world’s population was 1 billion. China had 295 million people, India 131 million, Russia 33 million, France 27 million, Ottoman Empire 21 million, Germany 14 million, Spain 11 million, Britain 10 million, Ireland and the USA 5 million.your heart is a powerful machine inside youYour heart beats 101,000 times a day. During your lifetime it will beat about 3 billion times and pump about 800 million pints (378 million litres) of blood. A normal heart beats 70 to 80 times a minute. Over 70 to 80 years, it gives a few billion beats. It is the powerful machine inside you
Rainbows do occur at night
It was previously thought that rainbows never appear at night. However, rainbows do appear at night and is known as moon rainbows or lunar rainbows.
To see a moon rainbow, many conditions must coincide:
1. there must be a full moon,
2. the moon must be either rising or setting,
3. and there must be mist in the air because a rainbow is made up of the rays of the sun that are reflected inside raindrops – or, in this case, the rays reflected by the moon.
Moon rainbows are a rarity; there have been only a few in the past 50 years.
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did you know ?
world population by 1801:
In 1801, when the first complete world census was carried out, the world’s population was 1 billion. China had 295 million people, India 131 million, Russia 33 million, France 27 million, Ottoman Empire 21 million, Germany 14 million, Spain 11 million, Britain 10 million, Ireland and the USA 5 million.your heart is a powerful machine inside youYour heart beats 101,000 times a day. During your lifetime it will beat about 3 billion times and pump about 800 million pints (378 million litres) of blood. A normal heart beats 70 to 80 times a minute. Over 70 to 80 years, it gives a few billion beats. It is the powerful machine inside you
Rainbows do occur at night
It was previously thought that rainbows never appear at night. However, rainbows do appear at night and is known as moon rainbows or lunar rainbows.
To see a moon rainbow, many conditions must coincide:
1. there must be a full moon,
2. the moon must be either rising or setting,
3. and there must be mist in the air because a rainbow is made up of the rays of the sun that are reflected inside raindrops – or, in this case, the rays reflected by the moon.
Moon rainbows are a rarity; there have been only a few in the past 50 years.
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