Yellowstone National Park is full of hot springs, geysers and grizzly bears. It also has stone forests, glass cliffs, a glacial lake and colorful canyons create

The River Thames has a colorful history. It was a river highway long before railways and roads were built. It has brought flood, disease and death to thousands

Noses are wonderful things. They help us breathe. They are lined with mucous and hairs called cilia, which trap germs and tiny particles that can make us sick.

Yellowstone National Park is full of hot springs, geysers and grizzly bears. It also has stone forests, glass cliffs, a glacial lake and colorful canyons create

The Yangtze River is known by many names. From its headwaters in the glaciers of Tibet, it drops nearly 16,000 feet (5000 metres) on its journey to the East Chi