What can survive for more than 250 years and may not reach sexual maturity until age 150? The Greenland shark. An antifreeze compound found in this Arctic species' skin keeps it from freezing in the frigid waters of the Arctic.
A new breakthrough could revolutionise the treatment of blood cancers like leukaemia.
@jameswoodford1 explains how the first human blood stem cells have been created in a lab - and could help cancer patients regain bone marrow after treatment
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