Humpback whale (Megaptera novaeangliae) flukes-up dive in Monterey Bay National Marine Sanctuary, California, United States of America, North America

Traditional colourful woollen hats for sale in Rahba Kedima (Old Square), Marrakech, Morocco, North Africa, Africa

Portrait of two children on a cart, the girl in a head scarf, the boy in a tall woollen hat, smiling and looking at the camera, at Bottiza Village, Romania, Europe

Quechua boy, Cuzco, Peru, South America

Traditional Norwegian woollen hats, Stavanger, Norway, Scandinavia, Europe

Boy at christmas, Munich, Germany, Europe

Traditional colourful woollen hats for sale in Rahba Kedima (Old Square), Marrakech, Morocco, North Africa, Africa

Man building a dry stone wall using Cotswolds stones and traditional skills (without using cement) in the Cotswolds, England

Silk weaver at work, Soatanana, Fianarantsoa province, Ihorombe Region, Southern Madagascar, Africa

Ilakaka sapphire mines, Ilakaka, Fianarantsoa province, Ihorombe Region, Southern Madagascar, Africa

Old man carrying child, Bhutan, Asia

A mountaineer covered in hoar frost on Helvellyn, Cumbria, England, United Kingdom, Europe

An attractive young woman sits on a log wrapped in a woollen blanket. Yukon Territory, Canada

An attractive young woman sits on a log wrapped in a woollen blanket. Yukon Territory, Canada

Man knitting and selling typical colourful Berber woollen hats in the historic town or medina, UNESCO World Heritage Site, Essaouira, Morocco, Africa

Teenage girl with colorful woollen hat during winter

Smiling women wearing winter clothing, Mount Horeb, Wisconsin, USA

Girl in woollen hat during winter

Woman on swing in snow, Mount Horeb, Wisconsin, USA

Teenage girl with colorful woollen hat during winter

Girl in woollen hat during winter

Teenage girl with colorful woollen hat and scarf during winter