Basic Education Minister Siviwe Gwarube says the 181 marking centres across the country have been audited and are ready to welcome some 50 000 markers. She says there were few disruptions during ...

What is laser photocoagulation for AMD? Laser photocoagulation is a type of laser surgery for the eyes. It's done to treat age-related macular degeneration (AMD). AMD can lead to vision loss. The ...

Can light itself cast a shadow? It may sound like a philosophical riddle, but researchers have found that under certain conditions, a laser beam can act like an opaque object and cast a shadow.