Explainer: Do I need to worry about COVID again?

New data from scientists and vaccine makers Moderna (MRNA.O) and Pfizer (PFE.N)/BioNTech (22UAy.DE) suggests that a newer, highly mutated variant of the virus that causes COVID-19 is not as alarming as some experts had feared when it was first detected several weeks

After the moon, India launches rocket to study the sun

Following quickly on the success of India’s moon landing, the country’s space agency launched a rocket on Saturday to study the sun in its first such solar mission. The rocket left a trail of smoke and fire as scientists clapped, a live