Every day, the Earth spins once around its axis, making sunrises and sunsets a daily feature of life on the planet. It has done so since it formed 4.6 billion years ago, and it will continue to do so ...
This story was updated at 9:40 a.m. E.D.T. on Monday, Sept. 10. Every day, the Earth spins once around its axis, making sunrises and sunsets a daily feature of life on the planet. It has done so since ...