How to choose a ripe and juicy watermelon

Although many people think that they will be able to choose a ripe and juicy watermelon just by hitting it, it is not so easy. In fact, there are a lot of people who don’t know how to choose the … Read more

New invention gives birth to permanent batteries

Based on the principle of taking excess energy available in nature, scientists have successfully created batteries that can last forever. For decades, people have been trying to find clean and inexhaustible energy sources to have a sustainable energy supply and … Read more

What caused mammoths to disappear on Earth?

About 4,000 years ago, Earth’s last woolly mammoth died alone on an island in the Arctic Ocean off the coast of Siberia, Russia. It was a sad end for one of the world’s most fascinating Ice Age animals . But … Read more