1.   Nature did its bit as well.

2.   Observe what nature does and try to emulate it.

3.   The prognostic importance of the anti-neutrophil antibody in both PSC and ulcerative colitis remains to be determined, as does the nature of the proteinaceous antigen.

4.   But from the start the intention has been to let nature do the painting.

5.   By alternating rows of standard crops with rows of nitrogen-fixing crops, such as soybeans or alfalfa, farmers can let nature do their fertilizing for them.

6.   Despite its usefulness in gardens, nature does just fine without wood chips or sawdust.

7.   If nature does it, OK.

8.   In the meantime, nature has been doing its own part to restore the Catskill trout habitat.

9.   Indeed, Akerlof of Michigan said that observations of the active nuclei of some galaxies showed that nature does things like beaming.

10.   Nature does all the heavy lifting.