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
This 11-day Train Journey Lets You Visit Both Yosemite and Yellowstone in One Incredible Trip - Travel+Leisure - 3/28/2025 Link »
Enjoy National Parks on a Budget With This Cost-Friendly Yellowstone Itinerary - Travel-Noire - 3/28/2025 Link »