Carolyn Y. Johnson

• Extreme Weather

A new slew of hazards are materializing in the storm’s wake, including dangerous cold in much of the Great Lakes and Plains.

• Science

The finding answers a long-standing conundrum about multiple sclerosis and recasts the modern-day illness, suggesting it is rooted in an evolutionary trade-off.

• Reader Q&A

Science reporter Carolyn Y. Johnson chatted with readers about CRISPR and the first gene-editing medicine.

• Science

Smithsonian scientists teamed up with Coast Salish elders and weavers to study the pelt of Mutton, a woolly dog who died in 1859.

• Science

The juvenile tyrannosaur, called Gorgosaurus, had dined on the drumsticks of a feathered, bird-like dinosaur called Citipes.

• Science

The therapies offer hope for a long-overlooked genetic illness that can cause excruciating pain and cut decades off people’s lives.

• Science

Adding a squirt of water to the beans before grinding reduces static, resulting in a more efficient way to brew a consistent, stronger-tasting shot of espresso.

• Science

After four decades of work, scientists found a successful therapy to treat a form of “bubble boy disease” that is common among Navajo and Apache children.

• Science

Scientists discovered a strange virus called MiniFlayer that latches onto a larger virus called MindFlayer in soil collected in Maryland.