Should a science discovery which has nothing but dangerous consequences for mankind be made public?

Explanation

Yes, discovery, good or bad, must be made public. Because that is the point of scientific research. To progress human knowledge. Something which appears dangerous today, may be put to use in some other form later. Controlled release to the public will help realise both it's dark and bright sides, knowing both nature of it's true potential are equally important. So, a discovery, which reveals a truth of nature should not be concealed.