In no spirit of levity, A. M. Hain of the Edinburgh Institute of Animal Genetics published the following item in the issue of Nature which reached the U. S. last week:
"It is not uncommon for the female rat to exhibit disapproval of a male rat introduced into her premises. Her attitude towards the male, at such times, is merely defensive—if he approaches her, she rises on her hind legs and utters cries of distress, repelling him with her forepaws.
"The circumstances seem...
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