In the 1920s, the US sold radioactive water as medicine. Called “Radithor Radioactive Water,” it was promised to cure all diseases. Later, it was found to cause cancer and was banned.

The world’s longest tunnel, the Gotthard Base Tunnel in Switzerland, is 57 km long. It runs under the Alps, with trains speeding through at 250 km/h. Construction took 17 years and cost $12 billi...

The largest solar power plant in the world is in India, with a capacity of 2.25 GW. It spans 50 km² and powers 1.5 million homes. The panels are so vast they’re visible from space!

The largest bat colony in the world lives in Bracken Cave, Texas, USA. Every night, 20 million bats fly out to hunt, eating 200 tons of insects! This spectacle draws thousands of tourists.

Ancient tools in South Africa, dated to 1.8 million years ago, belonged to Homo habilis.

The Voyager spacecraft carries a golden record with Earth’s voices! It was launched in 1977 to tell other civilizations about humanity.

In 2018, Japan created lab-grown meat from cow cells. It costs $50 per gram but doesn’t require slaughtering animals. Scientists say it’s the future of food, especially for countries with limit...

In India, ‘sand paintings’ on Kerala beaches are created by waves. They vanish with each new tide.

The chemical bond between hydrogen and oxygen in water (H₂O) forms through covalent bonds.

Archaeological finds in China revealed silk use 8,500 years ago, confirming textile technologies.

The oldest tree in the world, Methuselah, a bristlecone pine in the US, is 4,850 years old. It outlived the fall of the Roman Empire and still grows! Its exact location is kept secret to protect it...

The mysterious ‘singing’ of sands in the Gobi Desert sounds like a low hum. It’s caused by sand grains moving and creating resonance.

Humpback whales use bubble nets for hunting, releasing rings of bubbles to trap fish, as demonstrated by studies.

The largest flower garden in the world, Keukenhof in the Netherlands, spans 32 hectares. Every spring, 7 million tulips are planted, turning it into a colorful sea. It’s called the “Garden of E...

The Earth’s core reaches a temperature of 6,000°C, comparable to the Sun’s surface, due to radioactive decay.

The Shilin Stone Forest in China’s Yunnan Province amazes with its shapes! Geologists found this is due to limestone erosion creating such shapes.

Archaeological digs in Iraq revealed clay tablets with cuneiform writing from 5,000 years ago.

In Indonesia, a ‘fire bridge’ on the Brantas River glows at night. Locals decorate it with lanterns during festivals.

Mysterious ‘black sails’ in the sea off Chile are penguin flocks. They swim together, creating dark patches.

The Milky Way galaxy contains 100-400 billion stars, as determined by astronomical surveys.