Biohazards

Biohazard atoms appear at random times throughout the game.

You have 5 turns to clear these atoms. They will count down every time you make a move that does not make a molecule in Strategy mode. If it gets to zero, a new biohazard will appear, and eventually they will spread to other atoms. The new biohazard will count down too, so be careful!

In Action mode, these are especially troubling, because they will count down automatically after they appear.

Trivia

 * The most dangerous biohazard is the black one because you can't see it counting down, and if you don't know it exists, it can easily replicate into a bunch of atoms.
 * If you look at the biohazard counter in the images directory, there is a 6, which means that in early versions of the game, biohazards might have lasted for 6 turns instead of 5, or it might have been there for testing purposes.
 * If you are lucky, sometimes the new duplicated biohazard might be the same color as some surrounding groups of 3, and the duplication might even create a molecule.
 * Biohazards can also be used in bonus molecule patterns.