Behold the power of the Sun, at its peak on winter solstice

How can we embrace it? Sunlight does great things for us, here's how we can make sure we don't lose its connection in its absence. For our ancestors, the sun was the creator and destroyer of life. Here, author and science journalist Linda Geddes sheds the security of central heating and electric lights, on the shortest day of the year, and witnesses the sun, in all its power.