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The Seven Lost Cities Of The World (20 pictures)

The lost cities of the world were all once upon a time, great cities that belonged to great civilizations. But despite all their glory and power, none of these cities lasted to the present day due to many reasons, ranging from natural disasters such as a volcanic eruption as seen in Pompeii, Italy; to people-inflicted damage as seen in Persepolis, Iran. Many of these cities came to a sudden end, unexpected by its residents.


People Who Have the Worst Jobs Ever (42 pictures)

There are days when we all feel like we have the worst job in the world. But when you actually compare one to another, there’s a definite measureable difference between jobs that are considered pretty good and those that aren’t. These people have jobs that are certainly not nice, what is more, they can be called one of the worst. What do you say to such a day at work?

Watch this gallery to appreciate your own job.




Polar & non-polar molecules

Molecules come in infinite varieties, so in order to help the complicated chemical world make a little more sense, we classify and categorize them. One of the most important of those classifications is whether a molecule is polar or non-polar, which describes a kind of symmetry – not just of the molecule, but of the charge. In this edition of Crash Course Chemistry, Hank comes out for Team Polar, and describes why these molecules are so interesting to him.


Miniature working human heart grown in petri dish

Scientists from the University of Pittsburgh School of Medicine have successfully grown a working heart in a petri dish using the frame of a mouse’s heart and adult human skin cells, reverted back into their basic stem cell state. The heart works fully but beats at only half the speed of a full human heart — as well as obviously being too small. However, the breakthrough is the latest in a long line of developments which could revolutionise organ transplants.