Arthur Ashkin was honoured for his invention of "optical tweezers"
Referred to as "technology which may change the status quo", researchers at the South African CSIR have created the first digital laser.
Steenkamp describes physics as "always looking for answers to the ‘how does it work?’ question".
Dozens of partygoers at an outdoor rave near Moscow last week have lost partial vision after a laser light show burned their retinas.