Links to guides to writing in 12 subjects (but Engineering and STEM links were broken at last check).

Links to guides to writing in 24 different disciplines.

David Attenborough asks three key questions: how and why did Darwin come up with his theory of evolution? Why do we think he was right? And why is it more important now than ever before? (Shown as part of Sign Zone)

In the second series of An Earth Made for Life Gabrielle Walker continues her quest to understand why complex life is found on our planet, but not on any of our celestial neighbours. From the outback of Australia to the walls of the Grand Canyon Gabrielle unearths evidence of the dramatic changes that took place on our planet billions of years ago which may have triggered the rise of animals.

Professor of Genetics Steve Jones challenges evolutionary psychology, the controversial new science of how our brains and minds developed.

Professor of Genetics Steve Jones challenges the controversial science of evolutionary psychology. Evolutionary psychologists say human behaviour, such as who we marry, when we have children and even the quality of our sex lives, can be explained by having a Stone Age brain in a 21st century body. Professor Jones examines the scientific evidence for such claims and asks if we should be worried if contentious theories escape the world of science and enter the arena of social policy.

Scientist and broadcaster Prof Trevor Cox explores a new wave of biomimicry - copying nature - which aims to recreate the processes and systems, from self-cleaning lotus leaves to the Namibian fog-basking beetle, which can harvest moisture from the dry desert air. Trevor meets the people attempting to emulate nature's genius. Their goal is not just to copy nature's structures, but to recreate the processes and systems that evolution has taken billions of years to perfect.

Hunger is the loudest voice in my head. I'm hungry most of the time'. One January morning in 2003, William Leith woke up to the fattest day of his life. That same day he left London for New York to interview controversial diet guru Dr Robert Atkins. What started out as a routine assignment set Leith on an intensely personal and illuminating journey into the mysteries of hunger and addiction. "The Hungry Years" charts new territory for anyone who has ever had a craving or counted a calorie. This story of food, fat, and addiction will change the way you look at food for ever.

Programme 1: Water - a unique molecule. Our planet is dominated by water: it covers nearly three quarters of the Earth’s surface, is fundamental to plate tectonics, carves the landscape through erosion and is necessary for all life on Earth – and therefore all life as we know it.

Programme 2: Water elsewhere. NASA’s mission statement is to “follow the water”. The recent dramatic results from the small armada of probes on Mars suggest this approach is now paying off. It appears the planet was bathed in a watery past. But the surface is now dry and barren. Scientists are now using experiments on board both European and American probes to work out where all of the planet’s water has gone.