1.   Dust mites, the microscopic creatures that inhabit bedding, are a common source of allergies and asthma.

2.   The air teems with viruses, bacteria, fungi and other microscopic creatures.

3.   The microscopic creature devours cartilage and cripples rainbow trout.

4.   These microscopic creatures transform the pure, elemental mercury into the particularly dangerous organic compound called methylmercury.

5.   They are the nasty microscopic creatures that turn into adult heartworms.

6.   Victor Cardenes, a leading Spanish scientist, happened upon the microscopic creature while traveling in Belize.

7.   If the first microscopic creatures developed under such conditions, then life is tough indeed.

8.   Microscopic creatures called bdelloid rotifers have reproduced through asexual cloning for tens of millions of years.

9.   Yet somehow, scientists have found microscopic creatures dwelling in the eternal darkness.

10.   A mask covers his nose and mouth so that he does not inhale insects or microscopic creatures.