As a science enthusiast we all must have gone through the thought-process of extremities like what if we travel at the speed of light or more than that or the fact that- Is there anything which is more precise than an atom? Likewise, in the past many of the scientists after carefully studying the classical laws were always curious to explore beyond boundaries, but what amazed them was the fact that the laws that were applicable in their daily lives were actually far-far away from the extreme conditions and can't be utilized at extremities. This led to the curious minds to research more and experiment more to know the laws that govern the entire universe. Here we will be talking about many extremities-evolution of life, particles at sub-atomic levels, objects travelling at the speed of light, blackholes etc. Curiosity of the readers will thrive as we will keep on heading throughout this book.