Mark Kaufman, science reporter at Mashable, discusses California's history-making decision to mandate solar panels on all new homes and low-rise apartment buildings. [We talk what this means for the solar panel companies and the rest of the U.S.](https://mashable.com/2018/05/09/california-becomes-first-state-to-mandate-solar-panels-on-new-homes)
Officials warned residents and tourists packing Mediterranean destinations on Tuesday to stay indoors during the hottest hours as the second heat wave in as many weeks hits the region and Greece, Spain and Switzerland battled wildfires.
While the East Coast grappled with the aftermath of downpours that closed roads and rendered the water supply undrinkable in places, the West and other parts of the country contended with sizzling temperatures and unsafe air quality attributed to Canadian wildfires.
U.S. officials on Monday approved the first long-acting drug to protect babies and toddlers against a respiratory virus that sends tens of thousands of American children to the hospital each year.
