BBC Earth

Exploring the questions and mystery surrounding the age of the universe.

Power is shifting among the animal families as new threats emerge. As their young are growing and everyone is fighting to survive, a look at the winners and the losers.

Joanna follows the Silk Road from the Black Sea to the Caspian Sea, across the post-Soviet states of Georgia and Azerbaijan. On the way she learns not only about the history, but how these two very countries are still finding their identities.

Sue tries out a primitive hunting method while Andy adjusts the new puppies to his sled team, and the Hailstones take baby Wade to snare rabbits.

Jump aboard New Zealand's famous Northern Explorer, the longest running passenger service in the country. The train travels 423 miles along the historic North Island Main Trunk Line on a 12-hour voyage.

Ben meets Micky and Trina Cofer, who along with their four children, left behind the comforts of America to become missionaries in the freezing tundra of Outer Mongolia. In temperatures of below minus 20, Ben builds his own ger to sleep in, uses a freezing outhouse, attempts ice-fishing, joins a ...

Actor, comedian and history fanatic Tony Robinson travels across Egypt where are series of new tomb discoveries are being made. He travels the length of the Nile meeting the archaeologists unearthing extraordinary wonders.

Exploring the questions and mystery surrounding the age of the universe.

Power is shifting among the animal families as new threats emerge. As their young are growing and everyone is fighting to survive, a look at the winners and the losers.

Sue assesses the conditions of her new property at Chena River. Meanwhile, Ricko traps for beaver, while Jessie trains new puppies for the dog team.

A journey through Sicily that takes in seven Unesco World Heritage sites, with the first stop being a visit to a castle whose baron was inspired by Hampton Court. There's a meeting in Modica with Sicily's most famous chocolatier, and more.

Joanna's Silk Road journey takes her to Iran. Throughout the country she meets people eager to share the culture and innovations of the Persian civilisation which, thanks to the Silk Road, spread far beyond modern-day Iran.

Ben travels to a secret location in the Appalachian mountains of North Carolina, where forest dweller Tod Kershaw lives in a primitive skills community who have chosen not to live as members of modern society, but as opportunistic outsiders who scavenge other peoples' waste.

Dan meets the mummies of Tutankhamun's parents at the Egyptian Museum in Cairo, and discovers that they were actually brother and sister. CT scans reveal how this incestuous relationship could have been responsible for Tutankhamun's poor health. Raksha heads underground to a rare tomb excavation ...

A dagger entombed alongside the mummy of Egyptian pharaoh Tutankhamun was made with iron that came from a meteorite, researchers say.

As everyone faces the final reckoning the Great River Crossing begins. Gnu and Shani's foal are tested by crocodiles. Duma must save his mother.

Two devastating earthquakes hit Mexico in quick succession. An Australian storm-chaser becomes trapped in the middle of the most powerful tornado ever recorded in El Reno, Oklahoma.

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.

A space mission discovers the dramatic history of the Milky Way. Prof Brian Cox reveals how the galaxy endured multiple collisions as rival galaxies fought for survival.

The world's leading disease researchers provide insights on the outbreaks of Swine Flu and Ebola in places as diverse as West Africa, Hong Kong and Germany.

The team continue to investigate marine life. We also go to Atlantis, a deep sea research vessel, as it launches a sub that will help assess the health of the deep ocean.

A look at how without volcanoes, there would be no life on Earth. Although destructive, magma from the planet's molten core builds land, and mineral-rich ash from eruptions fertilises the surface.

Two devastating earthquakes hit Mexico in quick succession. An Australian storm-chaser becomes trapped in the middle of the most powerful tornado ever recorded in El Reno, Oklahoma.

Hannah Fry finds out how 1970s car crashes helped us to count our steps, why WWII dog-fights led to a crucial health monitor and how fitness trackers are even being used to catch killers.

A space mission discovers the dramatic history of the Milky Way. Prof Brian Cox reveals how the galaxy endured multiple collisions as rival galaxies fought for survival.

The world's leading disease researchers provide insights on the outbreaks of Swine Flu and Ebola in places as diverse as West Africa, Hong Kong and Germany.

The team continue to investigate marine life. We also go to Atlantis, a deep sea research vessel, as it launches a sub that will help assess the health of the deep ocean.

Ben travels to a secret location in the Appalachian mountains of North Carolina, where forest dweller Tod Kershaw lives in a primitive skills community who have chosen not to live as members of modern society, but as opportunistic outsiders who scavenge other peoples' waste.