The Great Wall of China is one of the most iconic human-made structures in history. It was built over many centuries by different Chinese dynasties to protect the country from invasions. The earliest parts were constructed as early as the 7th century BC, but the most famous sections were built during the Ming Dynasty (1368–1644). The wall stretch

The deepest known point in the ocean is the Challenger Deep, located in the Mariana Trench in the western Pacific Ocean. It lies about 11,000 meters (36,000 feet) below sea level so deep that if Mount Everest were placed inside, its peak would still be underwater. The pressure at this depth is over 1,000 times greater than at sea level, making it o

Thousands of years ago, the Sahara Desert was not the vast dry land we see today. It was actually a green, fertile region filled with rivers, lakes, plants, and animals a period known as the "Green Sahara" or "African Humid Period." This transformation occurred due to changes in Earth's orbit, which affected the monsoon rains and brought water to t

The oldest known living tree on Earth is a bristlecone pine named Methuselah, located in California’s White Mountains. This remarkable tree is estimated to be over 4,800 years old, meaning it was already growing before the construction of the pyramids in Egypt. These ancient pines thrive in extreme conditions harsh winds, dry soil, and freezing t