
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.
Latest articles by K.R. Callaway

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.

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.
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