Axum Bacterial Culture respawns if not picked up

There’s a bajillion of these already but this one is hopefully more balanced. The big problem right now is that if you lose the culture, there’s no way to get it back, and you’re permanently down a culture. I suggest that Axum Bacterial Cultures despawn if left on the ground for some length of time – it can be pretty long, thirty minutes or an hour even – and respawn one of their resource points. That way, you can be sure you’ll end up with exactly as many cultures as you’re intended to have; you can’t get extras but you won’t lose out on any either.