5. This tortoise is over 300 years old.
9. The Grand Canyon is 5 to 6 million years old. You weren’t born then!
13. The Great Sphinx is 5,000 years old.
15. The Great Wall of China is about 2,200 years old.
- 200 million women and girls have undergone genital mutilation, UNICEF data says. But the practice's prevalence is down.
- Hillary Clinton and Bernie Sanders debated head-to-head over who was a true "progressive." 🇺🇸
- Do you know what happened in the news this week? Time to take our quiz.