Let's take a look at how to observe cells under a microscope. No prizes for guessing the first thing you'll need: a microscope. But don't worry if you don't have one of your own. Ask your school ...

The trunk of each 'Christmas tree' (a transcription unit) represents a DNA molecule; the tree branches (granular strings attached to the DNA) are RNA molecules that have been transcribed from the DNA.

Scientists studying tree rings in northern Norway have linked ‘blue’ rings, caused by cold summers, to volcanic eruptions ...