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Science

What are hurricanes?

Hurricanes, typhoons and cyclones are regional names for strong tropical storms. Meteorologists use the term “tropical cyclones” to refer to the large amounts of low pressure air that move in an organized fashion over the seas around the Equator. Not all tropical cyclones turn into hurricanes; a few disappear hours after having been formed.

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What are tornadoes?

Tornadoes are the worst kind of storm known to man. They occur when a rotating column of air is in simultaneous contact with a rain cloud and the ground. Winds in this column might blow as fast as 300 mph! With such strong winds, you’ve probably concluded that it isn’t a good idea to stay in the path of a tornado!

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Lost in space

Have you been in a situation in which you got lost, you didn’t know where you were and you had no idea how to go back home? Imagine being lost in the middle of a forest, in a desert, or in the high seas. Finding one’s way in time and space is a problem men have always been trying to solve.

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Cave art

Rupestrian. Do you know what this word means? If you look in the dictionary, you will find this: "done on rock or cave walls." If "rupestrian" is something that was done on a rock, what do you think rupestrian art is?

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How to tell identical twins apart?

Identical twins are generated by one single egg and one sperm. That's why they share the same DNA. However, twins already show differences between one another inside the womb, because they respond differently to similar stimuli.

A hot story

One extra pinch of pepper and our mouths start tingling! Some people like hot food and some people don't, but do you know why pepper tingle our mouths?

The paths and strategies of peppers

Birds are not affected by the fruit of pepper trees

Archimedes and the crown

Once upon a time, there was a king who wouldn’t be fooled. He used the help of a wise Greek man and... “eureka”!

What are cyclones and tropical storms?

Do you know those windy, rainy days? Despite wind speeds and the amount of rain, this is all considered bad weather for us. But meteorologists notice variations in the severity of weather conditions and give different names for each stage of bad weather.

Lord of the Rings

Have you ever heard of the Lord of the Rings? No, it is not a movie about the adventures of Frodo in destroying a ring that gives you magic powers. It's Saturn, the second largest planet in the Solar System.

Changes on Earth

In the beginning, Earth was made of two different layers: the metallic nucleus and the rocky mantle, just like other rocky planet in the Solar System: Mercury, Venus or Mars. Through tectonism, a thin layer - the Earth’s crust - was formed around the entire planet, which tells it apart from other planets.

The Pacific Ring of Fire

The Pacific Ring of Fire is a region with very intense volcanic activity.

Volcanoes in Brazil

Brazil is located in the middle of the South American plate, that is, far away from the edges of tectonic plates. That is why there hasn’t been any active volcanoes in Brazil in a while - although there are signs that there has been volcanic activity in the past.

Geothermal energy

Geysers are springs that expel hot water and steam from time to time in variable temperatures.

Morphology of a Volcano

The shape of a volcano depend on its chemical content, on the gases and the type of lava it retains and the environment in the surface.

Types of eruptions

Eruptions might be effusive, explosive or mixed, according to the type of magma, the temperature and their chemical content.

What volcanoes expel and volcanic phenomena

Volcanic eruptions might expel solids, liquids or gases. The often-used word lava relates to molten rock.

Why is the sky blue?

Look out the window at the sky: What color is it right now? Looking up from the surface of our planet Earth, the sky takes on different hues depending upon the time of day. If the sun is out in the middle of the day, the sky will be blue; in late afternoon, the sky grows reddish; and at night, it’s simply black.

Preventing volcanic activity

When a dormant volcano starts signaling an eruption, it very rarely blows up at once. It starts showing a series of signs - smoke and other signals -, which, then, can be monitored.