Head in the clouds

Edward Graham on the importance of looking up

A depiction of a cumulostratus cloud, included in Howard's On the modification of clouds

Have you ever reached out on a mountain top and tried to ‘touch’ a cloud, and been disappointed? Or done the same on a foggy day, but feel like you’re reaching into nothing?

What then, is a cloud? How can these ‘airy nothings’, which at one moment appear to grow above…