Been to the dentist recently? Seems that dentistry has been around a LONG time. Archaeologist found teeth dating back 60,000 years that have evidence of dental surgery! In Siberia (a region in Russia),a tooth belonging to a Neanderthal, was found in a cave.The molar had a deep hole that showed a small tool had been used "drill" to remove decay. It was also believed that something like wax might have been used to "fill" the hole. Archaeologists also found that a kind of toothpick was used to pick food from teeth. This discovery dates dentistry further back that previously thought. Until recently, it was thought the first dental work dated back about 14,000 years.

Photograph from Live Science

Ziggurats were ancient structures built for the belief that their gods would have a home in flat Mesopotamia (present day Iraq). Since there weren't tree or many stones, the Mesopotamians used clay bricks to build the structures. Erosion has caused the ziggurates crumble. Now, the Iraqi government is hoping to rebuild the famous ziggurat of UR. Dating back to 3800 BCE, the ziggurat once stood about 98 feet tall and was 210 ft in length. It was built for Namma, the moon god. The ziggurat has already been rebuilt on two previous times in history.To replicate the ziggurat as best as possible, the same materials and method of brick construction will be used.

Photograph from Goodness Network

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The largest of all the species of penguins, the Emperor, has been placed on the endangered species list this past April. The penguins, only found on Antarctica, are in trouble due climate change causing less sea ice. Ice is used by the emperor penguins for breeding. With warming temperatures, the ice is melting quicker and before the babies are strong enough to make it on their own. The result has been many less penguins surviving and their numbers dropping to about 600,000 world wide. Learn more about the Emperor penguins: National Geographic Kids

Photograph from WWF.org

Scientists have observed orangutans in Indonesia doing something for the very first time. They were filmed crossing a man-made canopy bridge. Actually five such hanging bridges were made to help endangered animals avoid a tarred road. When completed, the road divided about 350 orangutans that lived in the area.Since constructed, macaques and gibbons have been found to use the bridges but recently a camera captured a Sumatran orangutan using one of the bridges. With orangutans, native to only Sumatra and the island of Borneo, being so critically endangered, perhaps, these bridges might help keep them safe when attempting to visit their friends on the other side of the road!