K.R. Callaway

K.R. Callaway

Live Science Contributor

K.R. Callaway is a freelance journalist specializing in science, health, history and policy. She holds a bachelor’s degree in Classics from the University of Virginia and is a current master’s student in New York University’s Science, Health & Environmental Reporting Program.

Articles by: K.R. Callaway

A group of bison walking in the center of a main road.

Yellowstone's iconic bison herds have merged into a single entity after 100 years of wandering the park

By K.R. Callaway published

More than 100 years after bison from other regions were introduced to the park, the two genetically distinct herds have finally become one.

A Fijian crested iguana (Brachylophus vitiensis) resting on a coconut palm on the island of Fiji in the South Pacific.

Iguanas sailed one-fifth of the way around the world on rafts 34 million years ago

By K.R. Callaway published

Ancient iguanas sailed around 5,000 miles from North America to Fiji by clinging to floating vegetation, new research suggests.

A rodent is seen eating seeds in New York, NY, United States

Rat numbers are skyrocketing across US cities — and it's only going to get worse

By K.R. Callaway published

Rat populations are growing in cities around the world because of climate change. A new study explains why this is happening now and what we can do about it.

A whitebark pine subfossil revealed beneath a melting ice patch in the Yellowstone region.

Scientists discover pristine ancient forest frozen in time in Rocky Mountains

By K.R. Callaway published

A melting ice patch in the Rocky Mountains uncovered an ancient forest, and these trees have stories to tell about dynamic landscapes and climate change.