The age of our planet is about 4.5 billion years old. Humankind knows very little what happened during the 4.5 billion years. But the scariest thing is that we do not know what will happen in the future on our planet. One of the first evidence to show us what happened in the past on Earth is a rock discovered in Australia. The age of this rock is about 2.5 million years. At that time, our planet was totally different. The landscapes were full of huge forests with giant trees, huge marshes, and even dinosaurs. It seems that most of the living … [Read more...]