Umair Irfan
Former correspondent
Latest articles by Umair Irfan
Dry lightning, extreme heat, and Covid-19 are all shaping California’s efforts to contain massive, deadly blazes.
Democrats say climate change is a priority. The DNC platform dropped its demand to end subsidies to dirty energy.
Why adenovirus and mRNA vaccines could start a revolution.
There’s a range of possibilities for how much the earth will warm. A new study narrows the likely window by the largest margin in decades.
Fever, Covid toes, and a loss of taste: Why are Covid-19 symptoms so weird and varied?
Covid-19 antibody testing, long-term immunity, vaccines, herd immunity (and more!), explained.
Not all experts are optimistic we’ll have a vaccine by the end of the year.
“I’m actually really worried about indoor transmission.”
Siberia’s triple-digit heat wave and wildfires are a glimpse into the future of the Arctic.
The giant dust cloud is part of a system that feeds the ocean, fertilizes the rainforest, and suppresses hurricanes.