How to decorate like a Viking

Green is the colour of hope, white symbolises surrender or innocence, and black binds the living to the dead.

Scandinavian bumblebees survive by incubating their eggs

It is a sure sign that spring is in the air: The sight of a bumblebee queen buzzing around spring flowers on a sunny day. But sometimes, when she is flying around, she is actually not looking for flowers, but on the hunt ...

Why do trees sleep badly?

You may think that trees and other plants are stationary and passive organisms that just stand around all day. So long as they get sufficient sun and water, everything is fine.

Selfies—why we love (and hate) them

At some point, when I was writing my new book, 'Selfies, why we love (and hate) them,' I walked around the Katrinebjerg halls at Aarhus University, Denmark, and asked people if they'd play a word association game with me.

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