1. Between 20 and 30 volcanoes erupt each year, most under the sea.
2. A huge underground river flowing under the Nile, with 6 times more water than the latter.
3. The city of Venice in Italy is built on 118 small islands, joined by 400 bridges. It is gradually sinking in the water.
4. The windiest place on the planet is Commonwealth Bay, Antarctica.
5. The baobab is a tree of the desert that can build up in the trunk up to 1000 liters of water.
6. The oldest tree in the world is a thorny cone pine California called "Methuselah". It has about 4600 years. The biggest tree in the world is a giant sequoia growing in California. It measures 84 meters high and 29 meters in circumference. The tree is the fastest growing eucalyptus, which can grow to 10 meters per year.
7. The Notothenia an Antarctic fish, has in its blood a protein that acts as an antifreeze and prevents fish from freezing in the cold ocean.
8. Tibet is the highest country in the world. The average height rises to 4,500 meters above the level of the sea.
9. The Highlands, Scotland, are among the oldest mountains in the world. Their age is estimated at about 400 million years.
10. One can find fresh water from the Amazon River a good distance into the ocean for about 180 km.
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