It's hard to get lost today, even in a new location, because we have great navigation in all our gadgets, but how on Earth did people use to find their way centuries ago? Determining one’s latitude is pretty easy, as Polynesians were among the first to discover it in the year 400 CE. Now we get to the tricky part: how to determine your longitude on a planet that is constantly spinning. In Antiquity and the Middle Ages, it was common practice to measure distance in time rather than in mileage. Marco Polo, for example, gave the size of lands he traveled on the Silk Road in days, not miles.

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You'd do anything to stay as far away as possible from this beast, but what do you think of going inside a tornado to check what it would be like? Vicious winds are hurling and spinning you around. They’re lifting you up at the same time. The first thing you’d sense would likely be the temperature changes. Inside this crazy twister, it can be 36 degrees colder than outside of it. But is it possible to escape it alive?

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Our Milky Way is estimated to contain over 100 billion stars, and is about 100,000 light-years across. In other words, if you were traveling at the speed of light, it would take you 100,000 years to cross the Milky Way from one end to the other. But what if Earth would be in the very center of all this beauty? The center of the Milky Way is home to some extreme environments that would make even the bravest astronaut shiver. High-energy particles and intense magnetic fields can wreak havoc on electronics and spacecraft. Would we survive there?

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Have you ever dreamt about visiting Mars? But then again, how would you survive there without water. If you've been imagining it as an extremely dry place, you might need to change your opinion! Scientists think there could have been a lot of water on Mars in the past. They've found loads of ancient river valley networks and lake beds on the surface of the Red Planet. Plus, on Mars, there are minerals and rocks that could have only formed in liquid water.

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Scientists think that our close neighbor – Mars – once experienced one experienced a collision with an asteroid, just like Earth. It happened around 3.4 billion years ago and might have caused a mega-tsunami on the Red Planet. Before the latest studies, the exact location of the impact crater wasn't verified – it was just a theory. To confirm it, a team of astronomers simulated a comet and asteroid collision in the area where they supposed the impact crater was. Could there have been life on Mars before the collision?

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If Jupiter suddenly decided to keep growing, it would eventually become a star, for example, a red dwarf. And its composition would allow this planet to do it. Red dwarf Jupiter could prevent the inner planets from following their orbits – because they wouldn't be able to find a balance between the gravitational forces of the two stars. The planets would move either closer to the Sun or closer to the newly formed red dwarf. What would it mean to our Earth?

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Do you enjoy solving tricky riddles and logical puzzles? Well, here's a real treat for you. Try to find answers to all the questions before the timer goes out. It will be not so easy at first, but the more you practice, the better you'll get at it. Soon enough, you'll boost your brain and IQ, and there will be no riddle you can't solve.

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Do you remember the sad story of Pompei that was destroyed by a dangerous volcano? Now imagine that several giant volcanoes begin to splash out an infinite amount of magma. It just doesn't end and covers an entire continent. This is a flood basalt. About 252 million years ago, in the northern part of our planet, a lot of magma accumulated under Earth's crust, and this disaster did happen. But can it happen again?

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