1.   A few scientists speculate that perhaps tiny spores of life from elsewhere in the universe may have fallen to earth to seed the process of biological evolution.

2.   By contrast, the tiny spores live in a dormant state.

3.   Ferns reproduce by tiny spores.

4.   The attackers are tiny spores that are forcibly ejected from a fungus that grows mainly on mulch and is called, aptly, the artillery or shotgun fungus.

5.   Whoever had done this had been able to produce the tiny spore of roughly one to five microns that could enter the lungs.