What is Radiation Fog?
We are used to feeling the warmth from the sun on our faces. Heat radiates millions of miles across space, through our atmosphere to warm…
Explore the Books
Tag: Sun
Urban Picture Puzzle
This picture was taken near the middle of the day in London. What direction are we looking? Clue: look for the circle and the square.…
Using A Tree Stump as a Compass on Hills
Regular readers will be familiar with the idea that a tree stump can be used as a compass. In trees exposed to plenty of sun,…
The Darkest Two Months of the Year
The sun is well over the southern hemisphere now. Sunrises and sunsets are well south too. In the northern hemisphere we have entered the darkest…
How To Tell If You Are Looking at a Full Moon
A lot of people see a big round moon in the sky and confidently call it a full moon. And then wonder, is it really?…
Foraging for Blackberries
It is that time of year already, the blackberries near me are ripening up nicely. Natural navigation and foraging can be blended together when searching…
Common Centaury – Centaurium erythraea
Common Centaury – Centaurium erythraea – is a small pretty flower, with five pink petals and a yellow centre. It is found in fairly dry…
Nieves Penitentes – A Rare Snow Compass
Nieves penitentes are an unusual snow formation, found only in dry air at high altitudes in areas exposed to intense sunlight. In the right conditions…
How to Find Your Way with Tree Leaves
Earlier I showed how it is possible to find your way using the colour of tree leaves. Now I’d like to show you how to…