Results tagged “astrobiology”

Shapes and Colors That Transcend Scale

@ESA-CAVES just tweeted another pair of Earth and space images. One is Supernova remnant W49B. The other is an unidentified benthic colonial organism. The similarities in color and shape are undeniable.

The House Committee on Science, Space and Technology held a December 4 hearing to assess the multi- and interdisciplinary nature of astrobiology research.

A new analysis of data from Galileo has revealed clay-type minerals at the surface Europa that appear to have been delivered by a spectacular collision with an asteroid or comet.

"We stand on a great threshold in the human history of space exploration."

"For thousands of years, humans have looked up at the stars and wondered whether life exists beyond our home planet."

"Chairman Smith, Ranking Member Johnson, and members of the Committee, thank you for the opportunity to testify today on the subject of the past and future of astrobiology."

The Habitable Epoch of the Early Universe

In the redshift range 100<(1+z)<110, the cosmic microwave background (CMB) had a temperature of 273-300K (0-30 degrees Celsius), allowing early rocky planets (if any existed) to have liquid water chemistry on their surface and be habitable, irrespective of their distance from a star.

Using the powerful eye of NASA's Hubble Space Telescope, two teams of scientists have found faint signatures of water in the atmospheres of five distant planets.

The future biosphere on Earth (as with its past) will be made up predominantly of unicellular microorganisms.

Astrobiology Hearing on Capitol Hill

A House Science Committee hearing titled "Astrobiology: Search for Biosignatures in our Solar System and Beyond" will be held on Wednesday, 4 December.

The biosignatures of life on Earth do not remain static, but change considerably over the planet's habitable lifetime.

Ancient Minerals: Which Gave Rise to Life?

Life originated as a result of natural processes that exploited early Earth's raw materials. Scientific models of life's origins almost always look to minerals for such essential tasks as the synthesis of life's molecular building blocks or the supply of metabolic energy.

My research team and I are now camped on the shores of Lake Obersee, a few km NE of Lake Untersee in the mountains of Queen Maud Land.

A rare, recently discovered microbe that survives on very little to eat has been found in two places on Earth: spacecraft clean rooms in Florida and South America.

Please join us in welcoming science historian Steven J. Dick as he begins his term today as the second Baruch S. Blumberg NASA/Library of Congress Chair in Astrobiology in the John W. Kluge Center at the Library of Congress. He will be in residence for one year.

Betcha didn't know that the unofficial motto of NASA's Astrobiology Program was "Neither snow nor rain nor heat nor gloom of Congressional paralysis stays these scientists from the swift completion of their appointed webinars" ;-)

Any textbook will tell you that oxygen is essential for advanced life to evolve. But why did life not explode when oxygen levels rose dramatically 2.1 billion years ago? This is the big question after a Danish/Swedish/French research team, led by University of Southern Denmark, has shown that the oxygen content 2.1 billion years ago was probably the same as when life exploded 500 million years ago.

We explore how questions related to developing a sustainable human civilization can be cast in terms of astrobiology. In particular we show how ongoing astrobiological studies of the coupled relationship between life, planets and their co-evolution can inform new perspectives and direct new studies in sustainability science.

Finding life on exoplanets may be more difficult than people thought, said Feng Tian, a professor at the Center for Earth System Science at Tsinghua University in Beijing, China. The report is being presented today to the American Astronomical Society Division for Planetary Sciences meeting in Denver, CO. The result is of special interest because it may shed light on how and where life could be identified on exoplanets.

The mystery of why life on Earth evolved when it did has deepened with the publication of a new study in the latest edition of the journal Science. Scientists at the CRPG-CNRS University of Lorraine, The University of Manchester and the Institut de Physique du Globe de Paris have ruled out a theory as to why the planet was warm enough to sustain the planet's earliest life forms when the Sun's energy was roughly three-quarters the strength it is today.

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