It's hard to preserve national parks "unimpaired," as US law directs, when they're overrun with tourists who stray off paths, strew trash and harass wildlife. A parks scholar calls for crowd control.
Huge fires roared through Yellowstone National Park in the summer of 1988, scorching one-third of the park. Since then the park has been a valuable lab for studying how forests recover from fires.
The notion of using dingoes to protect Australia's wildlife is based on wolves in the US, but research cast doubts on the link.
The vast majority of the bacteria that surround us are not free-floating but prefer to band together in cooperative communities called biofilms. How do biofilms form and cooperate?
Kudu and buffalo altered their activity when lions and spotted hyena were reintroduced into the areas where these species lived.
The last eruption from Yellowstone National Park, over two million years ago, appears to have been two smaller eruptions…