* The earth's crust is up to 60 km thick below the continents, whereas it is 5-10 km below the ocean.
* The earth is not a perfect global? Its circumference at the equator is 40,077 km, whereas it is 68 km less than the poles.
* The plate boundaries do not follow the coastline but instead go midway through oceans and continents.
* About 10,000 earthquakes occur every year, of which only a few causes damages. Most tsunamis do not cause any harm, as they happen in sparsely populated pacific areas.
* There is a sea surrounded by water. The Sargasso Sea to the east of Florida is separated from the surrounding Atlantic ocean by ocean currents.
* There are icebergs almost as significant in the area as the city of Houston in Texas. For example, the B15 Antarctic iceberg was the world's most enormous recorded.
* Researches are dive up to a depth of 6000 m in small unique submarines. The 'black smokers' were discovered in one such dive.
* A few people pan for gold in the Alps as a hobby? They swing the river sand in large flat bowls to accumulate gold particles. In this way, about 1g of gold can be collected every day, worth 15 euros.
* Around 12,000 years ago, in the last ice age, the gulf stream dried up. Consequently, the whole of Scandinavia was covered with ice.
* Earlier, people used to throw 'bottle messages' in the ocean currents to find out the flow directions.
* The temperature in the Sahara rises to 45 degrees C during the day, while it drops to just about 5 degrees C at night.
* A hurricane moves only at a speed of 20 km/hr over the sea. However, wind speeds within the air vortex can reach up to 300 km/hr and hurl house rooftops and entire boats through the air.
* The sun rises 16 times in 24 hours at the international space station. This means that the space station moved around the Earth 16 times during this period.
* The seasonal cycle in the polar and temperate zones of one hemisphere is opposite to that in the other. When it is summer in the northern hemisphere, it is winter in the southern hemisphere.
* The blue color of the earth is due to the copious amount of water present on it. Water is transparent, but deep water bodies 'absorb' the red and yellow rays of light. Therefore only the blue rays get reflected and reach our eyes.
* Even at a full moon, the earth is positioned in between the sun and the moon. When there is a lunar eclipse, the ground is precisely in line with the sun and moon.
* Eclipses are not rare occurrences at all. In the hundred years between 1900 and 2000, there were 148 lunar and 228 solar eclipses!
* The footprints of the astronauts can remain on the moon's surface for a long time because the wind does not blow over them.
* Over 2000 thunderstorms occur in the world every day.
* The Greek word planet means 'wanderer.' The name indicates that the planets 'wander' across the sky contrary to the stars.
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