observed phenomenon

Interesting thing I've noticed in Darwinia: Occasionally, after a virus has been caught just outside the radius of an explosion (as of a Grenade), it will, very occasionally, turn blue-white. Here's some pictures:

Strange, huh?

It's been known to happen when they're partially damaged.

You can also get them going almost invisible. Really annoying to find.

Ah! They're growing resistant!