a look at how light and dark can be represented

On the Rails: chief executive of Prism Rail is put through his paces (S)

Following the new management as it listens to staff and visitors in a bid to turn things around

Nightmare on WallStreet: profiling Joseph Jett. who was accused of defrauding one of the world's largest manufacturing companies (S)

The Final Mystery: how does the brain create our private conscious experiences? (S)

Ray Mears visits volcanic remains in the Lake District and Anna Grayson reports on the eroding sea stack off the Orkneys. Kate Humble reports on how the Midlands was a desert in ancient times. Show more

Headwaters of the Orinoco: wilderness expert Ray Mears goes deep into theAmazonian rainforest to meet the Sanema tribe (S)

Ray Mears goes deep into the Amazonian rainforest to meet the Sanema people, who are superb naturalists and exploit chemicals from trees and vines to catch prey and to induce hallucinogenic trances.

Big Bangs. Fly Me to the Moon: a personal view of the great pioneers (S)

Rick Murphy is a rocket expert overseeing the launch of four communications satellites

On the Rails: chief executive of Prism Rail is put through his paces (S)

Following the new management as it listens to staff and visitors in a bid to turn things around

Nightmare on WallStreet: profiling Joseph Jett. who was accused of defrauding one of the world's largest manufacturing companies (S)

The Final Mystery: how does the brain create our private conscious experiences? (S)

Ray Mears visits volcanic remains in the Lake District and Anna Grayson reports on the eroding sea stack off the Orkneys. Kate Humble reports on how the Midlands was a desert in ancient times. Show more

Headwaters of the Orinoco: wilderness expert Ray Mears goes deep into theAmazonian rainforest to meet the Sanema tribe (S)

Ray Mears goes deep into the Amazonian rainforest to meet the Sanema people, who are superb naturalists and exploit chemicals from trees and vines to catch prey and to induce hallucinogenic trances.

Big Bangs. Fly Me to the Moon: a personal view of the great pioneers (S)

Rick Murphy is a rocket expert overseeing the launch of four communications satellites

On the Rails: chief executive of Prism Rail is put through his paces (S)

Following the new management as it listens to staff and visitors in a bid to turn things around

Nightmare on WallStreet: profiling Joseph Jett. who was accused of defrauding one of the world's largest manufacturing companies (S)

The Final Mystery: how does the brain create our private conscious experiences? (S)

Ray Mears visits volcanic remains in the Lake District and Anna Grayson reports on the eroding sea stack off the Orkneys. Kate Humble reports on how the Midlands was a desert in ancient times. Show more

Headwaters of the Orinoco: wilderness expert Ray Mears goes deep into theAmazonian rainforest to meet the Sanema tribe (S)

Ray Mears goes deep into the Amazonian rainforest to meet the Sanema people, who are superb naturalists and exploit chemicals from trees and vines to catch prey and to induce hallucinogenic trances.

Big Bangs. Fly Me to the Moon: a personal view of the great pioneers (S)

Rick Murphy is a rocket expert overseeing the launch of four communications satellites

On the Rails: chief executive of Prism Rail is put through his paces (S)

Following the new management as it listens to staff and visitors in a bid to turn things around

Nightmare on WallStreet: profiling Joseph Jett. who was accused of defrauding one of the world's largest manufacturing companies (S)

The Final Mystery: how does the brain create our private conscious experiences? (S)

Ray Mears visits volcanic remains in the Lake District and Anna Grayson reports on the eroding sea stack off the Orkneys. Kate Humble reports on how the Midlands was a desert in ancient times. Show more

Headwaters of the Orinoco: wilderness expert Ray Mears goes deep into theAmazonian rainforest to meet the Sanema tribe (S)

Ray Mears goes deep into the Amazonian rainforest to meet the Sanema people, who are superb naturalists and exploit chemicals from trees and vines to catch prey and to induce hallucinogenic trances.

Big Bangs. Fly Me to the Moon: a personal view of the great pioneers (S)

Rick Murphy is a rocket expert overseeing the launch of four communications satellites