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   PR # 41083
   Recent ASCA observations of supernova remnants in the Large
   Magellanic Cloud show that the recent supernova rates of type Ia and
   type II are equal (1 : 1) and absolute rates of Ia and II are larger
   and smaller, respectively, than expected before. However it is most
   likely that young type II remnants are difficult to be observed
   because they explode in the low density cavity created by strong
   stellar wind of the progenitor star. We propose a seach for such a
   young type II supernova remnants to uncover the "missing link" of
   type II remnant evolution.
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