The northern lights are brighter this year. Scientists explain why
Solar activity is peaking, and a quieter sky is letting more of us see it.
The rooftop gardens cooling Europe’s old towns
Green roofs are turning hot terraces into the coolest streets in town.
Canal cities race to adapt as the water keeps rising
From floating homes to sponge streets, the old trading towns are adapting fast.
Strawberry season and the hidden cost of a warmer spring
An early harvest sounds good — until the bees are not ready.
Jellyfish blooms are a warning sign for warming seas
More jellyfish is rarely good news. Here is what they are telling us.