'Culture of secrecy' thwarting data sharing in Africa

The absence of a culture for sharing scientific data in many African countries is costing the continent numerous opportunities for accelerating its development, scientists warn.

New stem cell research takes aim at origins of human cancers

How do cells become cancerous, multiply uncontrollably, and form into tumors? And what role do aberrant embryonic stem cells play? These are big questions explored by medical researchers since the embryonic theory of cancer ...

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