Surprisingly little is still known about the molecular basis of our sense of touch. A newly discovered ion channel, published in Science, fills in the picture a little further.
With a little imagination, you can see a complete jungle in this photo, with large ferns and grass on the ground. Although plants are indeed made of organic material, what you see here is something quite different.
Solar panels are appearing on rooftops across the Netherlands in ever greater numbers. But Saudi scientists have printed a solar cell onto a soap bubble.