মহাবিশ্বের কিছু রোমাঞ্চকর তথ্য
বিজ্ঞান তাই শুধু বইয়ের পাতায় সীমাবদ্ধ নয়—এটি আমাদের অস্তিত্বের অবিচ্ছেদ্য অংশ। প্রতিটি নিঃশ্বাসে, প্রতিটি আলোছায়ায়, প্রতিটি হৃদস্পন্দনে লুকিয়ে আছে বিজ্ঞানের জাদু। আর সেই জাদুই মানুষকে বারবার প্রশ্ন করতে শেখায়—“আমি কে?”, “মহাবিশ্ব কোথা থেকে এসেছে?”, “আমরা কোথায় যাচ্ছি?” এই প্রশ্নগুলোর উত্তর খুঁজতেই বিজ্ঞান এগিয়ে চলেছে, আর সেই অনুসন্ধানই আমাদের করে তোলে কৌতূহলী, সচেতন ও আশ্চর্যভাবে জীবন্ত।
Some exciting facts about the universe
Some amazing facts and surprising facts about science
Science is a world where every question hides the door to a new mystery. The world we see every day, the sky we see, the air we breathe—all are the result of an endless search called science. From the beginning of the universe to the birth of thought in the human brain, science teaches us how to find light in the darkness. Now, let’s find out some amazing scientific facts that you cannot help but be surprised to hear.
The universe is about 13.8 billion years old, and the Earth is 4.5 billion years old—meaning the planet we live on is much younger than the universe. There are more than 100 billion galaxies in the observable universe, and each galaxy may contain hundreds of billions of stars! Light travels at a speed of about 300,000 kilometres per second, and it takes only 8 minutes and 20 seconds for light to reach the Earth from the Sun. The Sun accounts for 99.8% of the total mass of our solar system, meaning the planet we live on is only a tiny fraction of the solar system’s mass.
The human body is also a strange scientific wonder. We have about 100 trillion cells in our bodies, and these cells carry out billions of chemical reactions every second. There are more than 100,000 miles of blood vessels throughout our bodies, which could wrap around the Earth four times! The human brain has about 100 billion neurons, and each neuron communicates with the other to create a neural network whose complexity no computer has yet been able to match.
In fact, most of the atoms in each human body were once born in stars. In other words, we are all “stardust”—living beings made from stardust. Much of the water on Earth may have come from comets that fell billions of years ago. Hidden within the human body are iron, calcium, carbon, nitrogen, and oxygen—all of which were once formed at the centre of a cosmic explosion, a “supernova.”
What is even more surprising is that what is invisible to our eyes is actually a large part of the universe. Scientists say that visible matter is only 5% of the total mass of the universe; the rest is dark matter and dark energy, the existence of which we only perceive indirectly.
Extraordinary scientific wonders are also hidden in the animal world. For example, a cockroach can live for up to a week without a head, because they have separate holes in its body to control breathing. Octopuses have three hearts and blue blood. The oldest microbes on earth still survive at the bottom of the deep sea, where sunlight never reaches.
Science is therefore not limited to the pages of books—it is an integral part of our existence. The magic of science is hidden in every breath, every shadow, every heartbeat. And that magic teaches people to ask questions over and over again—“Who am I?”, “Where did the universe come from?”, “Where are we going?” Science advances in search of answers to these questions, and that search is what makes us curious, aware, and wonderfully alive.
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