Evidence is mounting about what may be a wealth of organic molecules – a potential indicator of life – on Mars, with new findings from Nasa’s Perseverance rover suggesting the presence of a ...

A laser optical pulse (blue) enters from the left into the hollow-core fibre filled with nitrogen gas (red molecules) and, along propagation, experiences a spectral broadening towards longer ...

Students see an animation showing that the things around them are made of atoms and molecules. Students use Snap Cubes to make models of atoms and molecules. They are given white, red, blue, and black ...

In the image to the right you can see the big red atoms (oxygen in this case) exert a pull on the hydrogen atoms in other water molecules around it. Those dashed lines are hydrogen atoms.