1967
Medicine
South Africa
Human heart transplant
Barnard transplants a heart in Cape Town.
Why it mattered
Organ replacement moved from theory to clinical practice.
Information Age
1967
2 recorded milestones at this point in the record.
1967
Science
Britain
Pulsars discovered
Jocelyn Bell Burnell spotted regular radio pulses from a rotating neutron star.
Why it mattered
Confirmed neutron stars and gave astronomy precise cosmic clocks.
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