Yes, the Earth is round, and the sun is indeed a star. Humans cannot breathe underwater without equipment, and penguins, despite being birds, cannot fly. Water is essential for all life on Earth, and lightning can strike the same place more than once. Not all snakes have venom; only some species are venomous. Mount Everest is the tallest mountain on Earth, while plants play a crucial role by producing oxygen. Finally, whales are marine animals and cannot live on land. These facts highlight the fascinating variety and rules of our natural world.