Thomas Brock, Whose Discovery Paved the Way for PCR Tests, Dies at 94: In 1966, he found heat-resistant bacteria in a hot spring at Yellowstone National Park that led to ... The New York TImes - 4/24/2021 Thomas Brock, Whose Discovery Paved the Way for PCR Tests, Dies at 94
Yellowstone Is Turning 150 — Here's How You Can Celebrate the Park and Learn More About Its Indigenous Roots - Travel+Leisure - 1/25/2022 Link »