Why is the earth's surface so restless, with volcanoes, earthquakes and mountain ranges?
Sir David Attenborough reflects on the profound effects of population growth.
Lonely Planet's Tom Hall gives his expert advice on travelling around Canada by rail.
Photos taken during filming of the documentary series.
Sir David Attenborough talks about Earth's oceans.
In this four-part series, we discover how some of life's greatest creations work.
Sir David Attenborough investigates whether the world is heading for a population crisis.
We know more about outer space than we do about our oceans.
New scientific discoveries reveal some incredibly improbable connections.
Insects are one of the most numerous and diverse groups of animals on the planet.
Find out more about the most inhospitable places on the planet; the Arctic and Antarctic.
Some lesser known places on our planet are some of the most incredible.
Get your wellies on at Glastonbury, trek to Machu Picchu or raft the Grand Canyon.
Discover Greenland's icy landscape or brave Spain's running of the bulls.
See in the new year in Samoa, dance the Tango in Argentina or see penguins in Antarctica.
Join a Saharan expedition, visit the Galapagos Islands or go to Japan for Honshu.
Trek through the jungle in search of gorillas or ride the Trans-Siberian railway.
Marvel at Italy's hilltop towns, dance 'til dawn in Dakar or visit Borobodur in Indonesia.
Spot lemurs in Madagascar, have a drink at Oktoberfest or go to Easter Island in Chile.
Get on your skis in Canada, try tiger-spotting in India or head to Timbuktu in Africa.
