MARK GARLICK / SCIENCE PHOTO LIBRARY MARK GARLICK / SCIENCE PHOTO LIBRARY
Calendar of the Universe, computer illustration. The Universe is estimated to be about 14 billion years old. This diagram presents the history of the Universe compressed into a single year, showing the relative timing of major events. It illustrates that the origin of complex life on Earth is relatively recent on a cosmological scale with the first animals not appearing until December 10. On this timescale, the whole history of human civilization is equivalent to the final minute of the year.
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