compoundchem: Added a newer, poster friendly version of the Metal Ion Flame Test Colours graphic to the store today! You can view the original post here, which includes an explanation of the origin of the colours.
the Best place to spot The Northern Lights Some of world’s best Northern Lights can be spotted in Finnish Lapland. The Aurora Borealis – as they are also called – can appear more than 200 nights a year. That’s pretty much every winter night.