Earth has stayed habitable for billions of years – exactly how lucky did we get?

Toby Tyrrell, University of Southampton

It took evolution 3 or 4 billion years to produce Homo sapiens. If the climate had completely failed just once in that time then evolution would have come to a crashing halt and we would not be here now. So to understand how we came to exist on planet Earth, we’ll need to know how Earth managed to stay fit for life for billions of years.

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New Horizons’ fantastic voyage began with a spectacular launch in 2006 (video)

On January 19, 2006, aboard an Atlas V rocket, NASA’s New Horizons probe started its fantastic voyage of exploration with a spectacular launch from the Florida coast toward Pluto and the mysterious realm of the Kuiper Belt beyond.

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New Seven Wonders of the World (New7Wonders)

None of the Seven Wonders of the Ancient World (also known as the Seven Wonders of the World) except the Great Pyramid of Giza (Kheops Pyramid) exist today. In fact, all the “seven wonders of the ancient world” existed at the same time for a period of fewer than 60 years (see their timeline below). That’s why a campaign started in 2000 to choose Wonders of the World from a selection of 200 existing monuments: New Seven Wonders of the World (New7Wonders of the World).

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What do astronauts eat? The space diet

What do astronauts eat in space?

After the holidays, interest in diets usually increases. Losing weight is in many people’s “new year’s resolutions” list. We usually want to lose weight as easily as we gained it. On the Internet, it is easy to stumble upon publications about the space diet or the diet of astronauts, promising a miraculous result – minus 20 kg in 20 days. Most of these published “space diets” on the tabloid websites are complete nonsense, in fact.

What exactly is the astronauts’ diet? Should they eat the same menu repeatedly, every single day? What food requirements must be met on Earth in order to be allowed to space flights? These and other questions were answered by the doctor of the Russian crew members of the International Space Station Alexander Vasin and the cosmonaut of Roscosmos Ivan Wagner.

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Why Crocodiles today look the same as they did 200 million years ago?

Max Stockdale, University of Bristol

One of the most enduring tropes about crocodiles is to describe them as “living fossils”. They are cold, slow-moving, and scaly, so they look like how one might picture a dinosaur. Like many clichés, there is an element of truth to this comparison. The crocodiles from 200 million years ago look surprisingly like the ones we know today.

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Top 20 Countries having the most number of UNESCO World Heritage Sites (2021 Update)

There are a total of 1121 UNESCO World Heritage Sites in the world (as of January 2021: 869 Cultural, 213 Natural, and 39 Mixed) in 167 countries. Here are the top 20 countries having the most number of UNESCO World Heritage sites.

What is a UNESCO World Heritage Site? According to the Wikipedia, “A World Heritage Site is a place (such as a building, city, complex, desert, forest, island, lake, monument, or mountain) that is listed by the United Nations Educational, Scientific and Cultural Organization (UNESCO) as being of special cultural or physical significance.

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