• The title of the paper is Celestial Sources of Terrestrial Mass Extinctions (See below.)
1) National Geographic: What are mass extinctions and what causes them?
2) American Museum of Natural History: Episode Twelve: Six Extinctions in Six Minutes
3) BBC: Gamma-ray burst “hit Earth in 8th Century”
4) Nature: Gamma-ray burst linked to mass extinction
5) Phys.org: Researchers learn more about the possible role of gamma ray bursts on life
extinction in the universe
6) CNN Space Science: Multiple star explosions may have contributed to a mass extinction on
Earth
7) Space.com: Did a supernova cause Earth’s mass extinction 360 million years ago?
8) Space.com: Did Supernova Explosion Contribute to Earth Mass Extinction?
9) Space.com: An asteroid and volcano ‘double punch’ doomed the dinosaurs, study suggests
10) National Geographic: This asteroid is one of the most likely to hit Earth. Here’s what it
means for our future.
11) National Geographic: Why NASA’s high-stakes maneuver to redirect an asteroid
surprised its own scientists
12) NASA SSERVI: The Asteroid Impact Hazard: Historical Perspective
13) Johns Hopkins Applied Physics Laboratory: Double Asteroid Redirection Test (DART)
– NASA’s First Planetary Defense Mission
14) Relevant Wikipedia pages.
