A groundbreaking discovery in Mammoth Cave reveals a new species of ancient shark, offering a glimpse into the diverse marine ...

Whether you’re into stalactite symphonies, prehistoric shelters, or just love your trails dark and damp, these 10 U.S. underground wonders (cited by fans on TripAdvisor and other sources) have you ...

A newly identified species of ancient shark has been discovered at Mammoth Cave National Park, marking another significant ...

A newly identified ancient shark species, Macadens olsoni, has been at Mammoth Cave National Park. The National Park Service ...