Featured Research

from universities, journals, and other organizations

Cosmologist Explores Notion Of 'Alien' Life On Earth

Date:
February 26, 2009
Source:
Arizona State University
Summary:
Astrobiologists have often pondered "life as we do not know it" in the context of extraterrestrial life, says Paul Davies, an internationally acclaimed theoretical physicist and cosmologist at Arizona State University. But has there been a blind spot to the possibility of "alien" life on Earth?

Astrobiologists have often pondered "life as we do not know it" in the context of extraterrestrial life, says Paul Davies, an internationally acclaimed theoretical physicist and cosmologist at Arizona State University. "But," he asks, "has there been a blind spot to the possibility of 'alien' life on Earth?"

Related Articles


Davies challengeed the orthodox view that there is only one form of life in a lecture titled "Shadow Life: Life As We Don't Yet Know It" on Feb. 15 at the annual meeting of the American Association for the Advancement of Science. His presentation was part of the symposium "Weird Life."

"Life as we know it appears to have had a single common ancestor, yet, could life on Earth have started many times? Might it exist on Earth today in extreme environments and remain undetected because our techniques are customized to the biochemistry of known life?" asks Davies, who also is the director of the BEYOND Center for Fundamental Concepts in Science at Arizona State University in the College of Liberal Arts and Sciences.

In the lecture, Davies presented, challenged and extended some of the conclusions from a July 2007 report by the National Research Council. That report looked at whether the search for life should include "weird life" – described by the Council as "life with an alternative biochemistry to that of life on Earth."

"If a biochemically weird microorganism should be discovered, its status as evidence for a second genesis, as opposed to a new branch on our own tree of life, will depend on how fundamentally it differs from known life," wrote Davies in the Nov. 19, 2007, issue of Scientific American.

Davies and other pioneers who speculate that life on Earth may have started many times are wondering "why we have overlooked this idea for so long?"

The concept of a shadow biosphere, according to Davies, "is still just a theory. If someone discovers shadow life or weird life it will be the biggest sensation in biology since Darwin. We are simply saying, 'Why not let's take a look for it?' It doesn't cost much (compared to looking for weird life on Mars, say), and, it might be right under our noses."

Davies, whose research is steeped in the branches of physics that deal with quantum gravity – an attempt to reconcile theories of the very large and the very small – is a prolific author (27 books, both popular and specialty works) and is a provocative speaker (he delivered the 1995 Templeton Prize address after receiving the prestigious award for initiating "a new dialogue between science and religion that is having worldwide repercussions").

Among his books are: "How to Build a Time Machine," "The Origin of Life," "The Big Questions," "The Last Three Minutes," "The Mind of God," "The Cosmic Blueprint" and his most recent book "The Goldilocks Enigma: Why is the universe just right for life?" published in the United States under the title "Cosmic Jackpot."

He is putting the finishing touches on "The Eerie Silence," to be published in 2010 to coincide with the 50th anniversary of the SETI Institute. According to Davies, the book is "a comprehensive fresh look at the entire SETI enterprise."


Story Source:

The above story is based on materials provided by Arizona State University. Note: Materials may be edited for content and length.


Cite This Page:

Arizona State University. "Cosmologist Explores Notion Of 'Alien' Life On Earth." ScienceDaily. ScienceDaily, 26 February 2009. <www.sciencedaily.com/releases/2009/02/090214162626.htm>.
Arizona State University. (2009, February 26). Cosmologist Explores Notion Of 'Alien' Life On Earth. ScienceDaily. Retrieved March 30, 2015 from www.sciencedaily.com/releases/2009/02/090214162626.htm
Arizona State University. "Cosmologist Explores Notion Of 'Alien' Life On Earth." ScienceDaily. www.sciencedaily.com/releases/2009/02/090214162626.htm (accessed March 30, 2015).

Share This


More From ScienceDaily



More Plants & Animals News

Monday, March 30, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Lions Make Surprise Comeback in Gabon

Lions Make Surprise Comeback in Gabon

AFP (Mar. 30, 2015) Lions have made a comeback in southeast Gabon, after disappearing for years, according to live footage from US wildlife organisation Panthera. Duration: 00:32 Video provided by AFP
Powered by NewsLook.com
New Arthropod Fossil Might Be Relative Of Spiders, Scorpions

New Arthropod Fossil Might Be Relative Of Spiders, Scorpions

Newsy (Mar. 29, 2015) A 508-million-year-old arthropod that swam in the Cambrian seas is thought to share a common ancestor with spiders and scorpions. Video provided by Newsy
Powered by NewsLook.com
Vietnam Rice Boom Piles Pressure on Farmers and the Environment

Vietnam Rice Boom Piles Pressure on Farmers and the Environment

AFP (Mar. 29, 2015) Vietnam&apos;s drive to become the world&apos;s leading rice exporter is pushing farmers in the fertile Mekong Delta to the brink, say experts, with mounting costs to the environment. Duration: 02:35 Video provided by AFP
Powered by NewsLook.com
Raw: Lioness Has Rare Five-Cub Litter

Raw: Lioness Has Rare Five-Cub Litter

AP (Mar. 27, 2015) A lioness in Pakistan has given birth to five cubs, twice the usual size of a litter. Queen gave birth to two other cubs just nine months ago. (March 27) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins