Exoplanets, Extremophiles and other Kinds of Minds

Just a few days after I wrote a highly-speculative post outlining the relationship of lifeforms and planets, and the intriguing link between what other kinds of minds are possible for specific characteristics of planets--along comes these findings of bacteria that feel at home with hypergravity.

In the experiment, researchers spun E. coli and other bacteria in an ultacentrifuge and revved it up to its fastest speed, amounting up to something like 400,000 Gs. The bacteria not only lived through the "hypergravity" experience, they even reproduced.

So, on planetary scales, I can say that these bacteria can survive on the surface of a white dwarf with the same spherical size as earth but with the mass equivalent to the sun. The gravitational force on its surface is somewhere around 300,000 G.

So if I was beamed down (a la Star Trek) onto the surface of a cool white dwarf, upon materializing I would immmediately be crushed into a pancake-shaped goo. But some of the bacteria inhabiting my body will still survive the crushing gravity! And if some other conditions permitted (let's be generous by adding oxygen into the atmosphere, aside from temperate other imaginings), they will feed on my jello'ed body and who knows what will evolve from that mass of goo? Let’s settle on “flat” beings for now, by virtue of the flattening gravity of a white dwarf.

Now, “flat” beings with 2.5-dimensional brains wouldn’t evolve much cognitive capacity compared with other brains whose neurons utilize the 3 dimensions of space to connect and communicate with other neurons. Each of our brain’s neurons has an average of 7,000 synaptic connections with other neurons. Clearly, a flat-brained creature on a white dwarf would have a disadvantage over it’s counterparts from earth. But not so if it’s neurons are utilizing wi-fi! Yes, its still highly speculative but there’s been a study outlining the possibility of some bacteria-signaling via radio frequency. If this biomechanism works on another planet, the 7,000 synaptic "wired" connections of a human brain would pale in comparison with a creature whose 'neurons' work in wireless mode to process information collectively with other neurons. What kind of thoughts would it have?

Now, these two possible characteristics of microbial life--hypergravity survival and radio wave communications--that I've mentioned in this post are completely unrelated. I’ve simply fused them in a hypothetical scenario in a playful attempt to mash-up planetary characteristics with extreme-life biomechanisms to speculate on expanding the possibilities of life on other worlds. Rev up your imagination and try it yourself. It's actually fun!

With all the new findings on extremophiles, which comes at a perfect timing with new exoplanet discoveries, we are opening up a lot of incredible possibilities for the mind to speculate about life in other parts of the universe.

Links:
Alien Bacteria can Breed in Extreme Hypergravity
Electromagnetic Signals from Bacterial DNA (PDF)
From Planets To Consciousness: Other Kinds of Minds

Sunless Biospheres

Today, I heard about the newly discovered sets of undersea vents found near Antartica. I can’t help but remember an article just a few days ago that mentioned the possibility of rogue planets harboring life. Although the theory is based on computer simulations, the researchers say that a “Steppenwolf planet” wandering in outer space like a “lone wolf”--may have liquid oceans if the water were heated from below by the planet's core and insulated from above by a thick layer of ice. A sunless biosphere.

I wonder how long these Steppenwolf planets will manage to keep the heat inside it's shell of ice to give enough time for life to synthesize from within its undersea vents. Time and luck is definitely a factor. Nevertheless, there’s a lot of planets out there; and not even counting exomoons in the equation, Hydrothermal Vents may be common for those planets that may have ample amount of water and enough internal heat as a source of energy. And judging from the resiliency of life as demonstrated by extremophiles thriving upon the energy and minerals around these vents, it makes me even more convinced of the possibility that life may be common in the universe.

Perhaps Life is not wholly dependent upon stars and suns. Perhaps Life just needs is a source of energy in any which form it is available and it will take hold given enough time and space--which in this case, is a Sunless Biosphere of a Steppenwolf Planet.

Links:
More deep-sea vents discovered
Rogue Planets could harbor life

Exobiology, Astrobiology and Exoplanets

So I tried Google's Ngram viewer on Exobiology, Astrobiology and Exoplanet, and came up with the chart shown above. As an added perk, I overlayed the yearly count of exoplanet discoveries on the graph.

As you can see, the term Exobiology was more popular than Astrobiology back then. And the word "Exoplanet" never occurred in any books prior to the 80's. But it all changed when the first confirmed exoplanet was announced in 1992. It was then that the trend of the exoplanet began, and propelled a sudden surge of interest in Astrobiology.

As new exoplanet discoveries continued to pile up, so did the field of Astrobiology continue to grow, evident in the increasing usage of the term in published books. By 1997, a few years after the discovery of 51 Pegasi b, the word astrobiology overtook exobiology.

Suddenly, Astrobiology was hip. It became increasingly more popular overnight, as if riding on the wave of exoplanets.

But what happened with the word Exobiology? Why didn't it pick up as much as Astrobiology did? It's a curious historical note, and the answer could be anyone's guess. And I'll give it a try.

The term Exobiology was coined by a Nobel Prize-winning scientist named Joshua Lederberg. I do not know exactly when the word Astrobiology was adopted to replace Exobiology but all we know is that it specifically means the "study of life beyond the Earth". But since there's no known life beyond the Earth (yet!), people said it's a field with no subject matter. That may well be a plausible reason why the term didn't catch on, no matter how cool the prefix "exo" is.

And since the term Astrobiology already picked up the momentum, it also locked on as the bastion to the science of "Life elsewhere in the universe"--a phrase that makes it seem a wider field than by just saying "Life outside earth".

Now here are questions to entice the next generation. Will exobiology make a comeback? Do you think the word exoplanet will skyrocket in the next decade? And what about...ahem...Exoplanetology?

Only time will tell.

The Sense of Wonder at the Crossroads

Definitely, the Crossroads was the best conference I have ever attended in my life. The danger of driving sleepy through foggy roads overnight from Jersey to Cambridge was well worth it. If I was a real journalist, I would have written numerous science topics from that event because all speakers were excellent in their presentations. Every single one of them provided plenty of ideas to write about.
Gerrit Verschuur gave a nice warm-up with the Drake Equation. Dimitar Sasselov mentioned "Life as a Planetary Phenomenon", an idea put forward by Andy Knoll--which is the best phrase I ever heard in years. Maria Zuber's presentation about landing humans on Mars was detailed, and she gave a very informed account of the challenges that a human would undertake on a round-trip mission to Mars. Craig Venter gave an overview about synthetic life which made me very curious how these artificial lifeforms would provide insights to Astrobiologists looking for alien biomarkers on other worlds. Juan Enriquez gave a mesmerizing tour of exciting research brewing around a corner in Cambridge that gave hints of the Singularity, and the coming of Homo Evolutis. Then Peter Ward gave an eye-opening account of his Medea Hypothesis, urging us to stop CO2 and engineer our way out of Global Warming to become true anti-Medeans. David Charbonneau spoke with utmost clarity and eloquence that for a moment I saw Carl Sagan in him. I also think Charbonneau owned the *best* slide ever--Welcome to the Era of Comparative Exoplanetology. He also gave a very positive note about the role of Amateur Astronomy in contributing to Science specially in the field of Planet-hunting. I was delighted to know that the future of Citizen Astronomy is brighter than ever before.
At that point however, the moderator David Aguilar--an Astronomer who's ever so keen, promptly noticed that the conference had already taken an unexpected turn. And it was punctuated by Freeman Dyson who was the last speaker.
Dyson opened his talk with the story about William Herschel who was a dedicated Amateur Astronomer that made excellent contributions to Science and Astronomy. I was moved when Dyson said, "Amateurs, do not be discouraged!"
Thus when I was picked by David Aguilar to have the privilege of asking the last question, I worked hard to contain myself in front of Dyson. "Sir, I am touched by your opening story about Herschel, and how you encouraged Amateurs. And I would like to hear it all over again. May I ask that you inspire us all once more?"
Dyson then proceeds to mention the meeting of Worlds, intersection of Cultures, melding of Disciplines, and the reconnection of Poetry, Science, Art, and the role that technology will play. He then goes on to recommend an upcoming book "The Age of Wonder", by Richard Holmes. It is a tale about the sense of wonder, a common trait among the Romantic Poets and Scientists during Herschel's era.
Finally Dyson concludes the conference saying that we will soon witness the coming of a new Age of Wonder.
Indeed we are on the Crossroads, at the intersection of exciting new worlds where we shall see wondrous things in the coming years.
As I drove back home through the rain, I was mesmerized all the way. I went to Cambridge seeking adventure and inspiration, and I truly found it, with a sense of Wonder.

An Expedition into a World of Science and Imagination

If i wanted to go into an expedition of an alien safari, I would visit this place: Expedition by Wayne Barlowe.
It is speculative biology and Imaginative science at it's best, all rendered with great artistic skill by an artist with a scientific bent, or perhaps a scientist with an artistic inclination.
Whichever is the case, these exo-lifeforms are a feast to my eyes and a tickle to my imagination.
It's amazing how my foray into Astrobiology and Exobiology has taken me to awe-inspiring discoveries such as this one. The worlds opened up by the marriage of Imagination and Science is an endless adventure.
What will the discovery of thousands of exoplanets bring to the fusion of Science and Art? My mind is simply blown away.

Rhythm of Life

If anyone ever noticed the dynamic nature of our universe, one would not miss the property of rhythm embedded within the cosmic infrastructure.
The most obvious is the day and night cycle. Everyone knows it is a result of earth's rotation. Everything seems to be spinning, revolving, rotating -- galaxies, stars, planets and moons.
Now how does this relate to life?
Beginning with yourself, o mortal being, your whole life and consciousness rests upon rhythm and cycle. Your mind and body would not even survive without sleep for more than a week, er maybe a month for some.
The effect of "spin" naturally ripples all the way to the metabolism and physiology of any lifeform that manages to evolve within a "spinning" system.
Lets take a look at how rhythm affects all life on earth: The sleep cycle of every animal on earth is a natural outcome of the day and night caused by a spinning earth. Hibernation is caused by the seasons, a result of earth's tilted axis of rotation. Still other biological processes such as metamorphosis, bird migrations, and mating seasons (everybody's favorite) can be attributed to planetary characteristics of orbit and rotation.
There is no doubt, rhythm is embedded in the cosmos, and ultimately within life itself. Rhythm is one of the properties of life that is seldom mentioned, and yet is one of the primal screams of life itself.
Wherever life exists, on earth, in other planets of other suns, we can be sure that it is definitely ruled by rhythm as well.
Hinging on the fact that most exoplanets discovered so far have elliptical orbits, and speculating upon those whose orbits at least intersect the relative habitable zone, we can expect organisms that develop on that planet to adapt to the cycle of extreme weather patterns and seasons. It will "learn" to "hibernate" during a freezing season when its planet is farthest from its star, and "wake up" when its planet comes closer to its sun.
That was just an example, perhaps a little extreme to illustrate a point--but we can be sure of countless ways on how rhythm may be implemented in an almost infinite number of planets in the universe, each with it's own unique combinations of orbit, rotation, axis tilt, and so on.
And along with those planetary properties, comes the dizzying variety of how the resulting rhythm and cycle affects the development of life on those planets. We can expect those alien lifeforms to have a fair share of the similar rhythmic cycles we know of, such as sleep, hibernation, menstruation, migrations, metamorphoses and other forms of cyclical rhythms that are common to all forms of life.
The diversity of cosmic life, based solely on planet-induced rhythms could be quite unlike anything we've ever imagined, yet on the other hand -- they might behave quite similarly in some way or another, due to the universal rhythm of life.

An Exoplanet, its Moon, and Gas Clouds

This is what hapens when I look too much at exoplanet paintings. Having recently purchased two books that feature the illustrations of Lynette Cook--one of which is Infinite Worlds--I was then inspired to let my imagination run wild, and mess around with Photoshop. What came up was this picture of a terrestrial exoplanet and it's moon with a glowing interstellar cloud in the background.
Both the exoplanet and it's moon is inhabited by alien civilizations. However, the lifeforms on each of them started almost simultaneously, evolved independently and in parallel. Therefore, their ecosystems differ significantly.
The difference in color between the exoplanet and its moon are caused by the distinct chemicals in their atmospheres that are caused by life's unique metabolisms.
The glow in the background is caused by cosmic rays bombarding a giant interstellar gas which cause it to become energetic.
It might be possible that life on both rocks were jump-started and sustained by the energy from the gas cloud.
Basking in an unlikely source of energy, life in this alien planetary system would be so much different than life on earth.
Different. But not impossible.

What We Still Don't Know (Documentary)

A documentary about searching for the answer to the fascinating question "Are We Alone?" Touches upon Exoplanets and Exobiology. Perfect for Exoplanetology!