February 2018 Blog Posts (5)

Defining Life

Before we discuss actual examples of unearthly life, it would be prudent to set forth a solid definition of what life actually entails. For my own worldbuilding purposes, I have composed a simple set of requirements for something to be defined as alive:

> Inertia-independent reaction to stimulus, however slight and regardless of speed.

> The independent production/collection and storage of energy within the entity in question for biological…

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Added by Spyglass on February 28, 2018 at 12:14pm — No Comments

The Most Adaptable Species

When we think of the most adaptable species, what comes to mind? Camels are able to survive without food or water for months, cockroaches are said to have survived the atomic bombs on Hiroshima and Nagasaki in World War II, and Emperor Penguins are able to make journeys 60+ miles long with their last meal being four months earlier. All of these species are very well suited towards their particular environment, but if one were to put a camel in Antarctica, or an emperor penguin in the Gobi…

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Added by chi hai on February 26, 2018 at 12:35am — 1 Comment

Metabolism or RNA first? Blog 2

There have been many arguments to determine which function of life came first. The ability to use energy or the ability to record and transfer genetic information. To me it seems very contradictory to discern which one of them came first because it appears that life as we know it could not have existed without both simultaneously working.

 

There is no logical purpose for the efficient use of energy to exist if there was no way to transfer that information onto the next…

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Added by Jason Choi on February 5, 2018 at 2:39pm — No Comments

Life as a Carnot Cycle (Blog 2)

For at least the last few meetings we have discussed the idea of LUCA. A name for the evidence that suggests that all life, bacterial, archaeal, and eucaryal, all formed from a common organism. Woese suggests that LUCA, or the root of the universal phylogenetic tree, could not have equivalent metabolically to "modern cells." In his paper, Woese seems to dismiss the idea of a metabolism-first world instead providing evidence for horizontal gene transfer (HGT) in an RNA-first…

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Added by Robert J. Mitchell on February 5, 2018 at 1:44pm — No Comments

The Most Adaptable Species

When we think of the most adaptable species, what comes to mind? Camels are able to survive without food or water for months, cockroaches are said to have survived the atomic bombs on Hiroshima and Nagasaki in World War II, and Emperor Penguins are able to make journeys 60+ miles long with their last meal being four months earlier. All of these species are very well suited towards their particular environment, but if one were to put a camel in Antarctica, or an emperor penguin in the Gobi…

Continue

Added by Derek Velzy on February 3, 2018 at 1:12pm — No Comments

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The 5th Mexican School of Astrobiology

Posted by Tardigrelda on June 24, 2019 at 1:00pm 0 Comments

I am really glad to invite everyone to the next Mexican School of Astrobiology (aka EMA) which is this August.

¡Anímate a participar en la 5ta Escuela Mexicana de…

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A consortium of representatives of European Research Organisations has taken the initiative to create a virtual institute named the “European Astrobiology Institute” (EAI) with the ambition of enabli…

Posted by Wolf D. Geppert on February 24, 2019 at 1:33am 0 Comments

A consortium of representatives of European Research Organisations has taken the initiative to create a virtual institute named the “European Astrobiology Institute” (EAI) with the ambition of enabling Europe to emerge as a key player in Astrobiology and to…

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AbSciCon session on life in high salt habitats

Posted by Jeff Bowman on December 14, 2018 at 8:12am 0 Comments

Abstract submissions are open for AbSciCon 2019!  You can check out the full selection of sessions here, however, I'd like to draw your attention toward the session Salty Goodness: Understanding life, biosignature…

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vemala Network

Posted by Apit Supriatna on October 7, 2018 at 1:07am 0 Comments

Vemala.com merupakan situs yang membahas seputar gaya hidup, dengan berbagai macam informasi kesehatan, olahraga, Fitness, review, kecantikan, relationship,Lifestile, Tips kehamilan,Fashion dan lain sebagainya.

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Ask your questions here!

Started by Gina Riggio in SAGANet Discussions. Last reply by Jacob Haqq-Misra on Saturday. 37 Replies

If you are trying to ask a question live during Ask an Astrobiologist, please do so in the main chatroom at the bottom of the screen! You can also ask on twitter…Continue

Spiritual connection

Started by MOHIT Kakkar in The Cutting-Edge of Astrobiology Jun 15. 0 Replies

Hi pls answer my spiritual questions.Continue

Conference "Impacts and their Role in the Evolution of Life", Tällberg, Siljan crater area, Sweden, 10-13 June 2019

Started by Wolf D. Geppert in Upcoming Conferences / Workshops Mar 12. 0 Replies

We would like to invite you to participate in the conference:Impacts and their Role in the Evolution of LifeTällberg, Siljan crater area, Sweden, 10-13 June 2019Topics covered by the conference will…Continue

Postdoctoral Research in Microbial Nitrogen Cycling at Ames

Started by Melissa Kirven-Brooks in Jobs / Post-docs / Other opportunities Nov 28, 2018. 0 Replies

The Bay Area Environmental Research (BAER) Institute is seeking a full-time postdoctoral researcher to perform measurements of nitrogen cycling in photosynthetic microbial mats at NASA’s Ames…Continue

Tags: cycling, nitrogen, doc, Post

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