Impressive paper in biology: part 1

This paper tells us that we should not always ignore seemingly paradoxical results. In this sense, I have found it to be impressive.

PS

Please look forward to part n (n = 2,3,4,5…..).

Addendum primum:

The Nobel Prize in Physiology or Medicine 2007 has just re-reminded me of the importance of the method employed in the above paper.

Addendum secundum:

I have been unaware of endothelins’ role in axonal guidance.

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