Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

In The Medea Hypothesis, renowned paleontologist Peter Ward proposes a revolutionary and provocative vision of life's relationship with the Earth's biosphere--one that has frightening implications for our future, yet also offers hope. Using the latest discoveries from the geological record, he argues that life might be its own worst enemy. This stands in stark contrast to James Lovelock's Gaia hypothesis--the idea that life sustains habitable conditions on Earth. In answer to Gaia, which draws on the idea of the "good mother" who nurtures life, Ward invokes Medea, the mythical mother who killed her own children. Could life by its very nature threaten its own existence? According to the Medea hypothesis, it does. Ward demonstrates that all but one of the mass extinctions that have struck Earth were caused by life itself. He looks at our planet's history in a new way, revealing an Earth that is witnessing an alarming decline of diversity and biomass--a decline brought on by life's own "biocidal" tendencies. And the Medea hypothesis applies not just to our planet--its dire prognosis extends to all potential life in the universe. Yet life on Earth doesn't have to be lethal. Ward shows why, but warns that our time is running out. Breathtaking in scope, The Medea Hypothesis is certain to arouse fierce debate and radically transform our worldview. It serves as an urgent challenge to all of us to think in new ways if we hope to save ourselves from ourselves.

Catastrophes (Geology). --- Environmental geology. --- Evolution (Biology). --- Extinction (Biology). --- Historical geology. --- Life (Biology). --- Extinction (Biology) --- Life (Biology) --- Evolution (Biology) --- Catastrophes (Geology) --- Animal evolution --- Animals --- Biological evolution --- Darwinism --- Evolutionary biology --- Evolutionary science --- Origin of species --- Geoecology --- Extirpation (Biology) --- Evolution --- Extinction --- Extirpation --- Historical geology --- Biology --- Biological fitness --- Homoplasy --- Natural selection --- Phylogeny --- Geology --- Environmental protection --- Physical geology --- Extinct animals --- Environmental geology

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Mastodon --- Extinction (Biology)

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

n November 12, 2002, Dr. John Chambers of the NASA Ames - search Center gave a seminar to the Astrobiology Group at the OUniversity of Washington. The audience of about 100 listened with rapt attention as Chambers described results from a computer study of how planetary systems form. The goal of his research was to answer a dec- tively simple question: How often would newly forming planetary systems produce Earth-like planets, given a star the size of our own sun? By “Ear- like” Chambers meant a rocky planet with water on its surface, orbiting within a star’s “habitable zone. ” This not-too-hot and not-too-cold inner - gion, relatively close to the star, supports the presence of liquid water on a planet surface for hundreds of million of years—the time-span probably n- essary for the evolution of life. To answer the question of just how many Earth-like planets might be spawned in such a planetary system, Chambers had spent thousands of hours running highly sophisticated modeling p- grams through arrays of powerful computers. x Preface to the Paperback Edition The results presented at the meeting were startling. The simulations showed that rocky planets orbiting at the “right” distances from the central star are easily formed, but they can end up with a wide range of water c- tent.

Life on other planets. --- Exobiology. --- Exobiology --- Extraterrestrial Environment. --- Origin of Life. --- Environment, Extraterrestrial --- Space (Astronomy) --- Environments, Extraterrestrial --- Extraterrestrial Environments --- Spaces (Astronomy) --- Space Flight --- Astrobiology --- Extraterrestrial Life --- Life, Extraterrestrial --- Extraterrestrial Environment --- Habitable planets --- Extraterrestrial life --- Fermi's paradox --- Genesis of Life --- Life Geneses --- Life Genesis --- Life Origin --- Life Origins --- Popular works. --- Science. --- Astrobiology. --- Astronomy. --- Popular Science. --- Popular Science in Astronomy. --- Science, general. --- Organelle Biogenesis --- Planets --- Biology --- Life --- Origin --- Life on other planets --- Vie extraterrestre --- Exobiologie --- Science, Humanities and Social Sciences, multidisciplinary. --- Space Biology --- Biologies, Space --- Biology, Space --- Space Biologies --- Space Research --- Origin of Life --- Prebiotic Chemical Evolution --- Chemical Evolution, Prebiotic --- Evolution, Prebiotic Chemical --- Prebiotic Chemical Evolutions

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Extinction (Biology)

Choose an application

• Reference Manager
• EndNote
• RefWorks (Direct export to RefWorks)

Cretaceous/Tertiary boundary --- Extinction (Biology) --- Impact --- Volcanism --- Congresses --- 551.7 --- 56.017.4 --- 550.34 --- 52-424 --- -Cretaceous-Tertiary boundary --- -Volcanism --- -Impact --- -Collisions (Physics) --- Materials --- Blast effect --- Shock (Mechanics) --- Splashes --- Volcanicity --- Vulcanism --- Geodynamics --- Volcanology --- Boundary, Cretaceous-Tertiary --- Cretaceous-Tertiary transition --- K-T boundary --- Tertiary-Cretaceous boundary --- Transition, Cretaceous-Tertiary --- Geology, Stratigraphic --- Animals --- Extirpation (Biology) --- Biology --- Extinct animals --- Historical geology. Stratigraphy --- Causes of extinction of organisms in various eras --- Seismology. Earthquakes --- Collisions of bodies and systems (astronomy) --- Dynamic testing --- Extinction --- Extirpation --- Conferences - Meetings --- -Historical geology. Stratigraphy --- Boundary, Cretaceous-Paleogene --- Cretaceous-Tertiary boundary --- K-Pg boundary --- Paleogene-Cretaceous boundary --- 550.34 Seismology. Earthquakes --- 56.017.4 Causes of extinction of organisms in various eras --- 551.7 Historical geology. Stratigraphy --- -550.34 Seismology. Earthquakes --- Cretaceous-Paleogene boundary --- Congresses. --- Cretaceous-Paleogene boundary. --- Volcanism.