Lifeboat Foundation: Safeguarding Humanity
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Category: alien life – Page 139

Forget about generation ships, suspended animation, or the sudden appearance of a worm hole. The most likely way for aliens to visit us — whatever their motive — is by sending robotic probes. Here’s how swarms of self-replicating spacecraft could someday rule the galaxy.

Top image by Alejandro Burdisio via Concept Ships.

Back in late 1940’s the Hungarian mathematician John Von Neumann wondered if it might be possible to design a non-biological system that could replicate itself in a cellular automata environment, what he called a universal constructor. Von Neumann wasn’t thinking about space exploration at the time, but other thinkers like Freeman Dyson, Eric Drexler, Ralph Merkle, and Robert Freitas later took his idea and applied it to exactly that.

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As the third most abundant element in the universe, oxygen is both abundant and the best element in the periodic table from which to produce energy for metabolism. That’s one reason planetary scientist David Catling argues that E.T. would also breathe oxygen; as noted in this article blast from the past.

What are the odds that visiting space aliens could simply walk off their craft and start breathing our own oxygen-rich atmosphere?

Better than is generally appreciated; even among some astrobiologists.

Such other-worldly “visitors” may not be able to click off the first leg of the New York Marathon, but David Catling, a planetary scientist at the University of Washington in Seattle, argues that it’s likely they would have evolved to use molecular oxygen (O2) for respiratory metabolism.

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Though the quest to find water on distant planets is the most talked-about way that researchers are looking for extraterrestrial life, one of our best bets at understanding life’s complexities lies with comets, not planets.

In fact, the icy space balls are already known to form amino acids and nucleobases, two key substances needed for life to take root. And now, researchers may have found another necessary ingredient: ribose, the ‘R’ in RNA.

Before we dive into the new discovery, it’s important to understand what life, as we know it, needs to get started, and how we think it may have happened here on Earth. Life on Earth requires three macromolecules: RNA, DNA and proteins. The current understanding is that RNA, or ribonucleic acid, came before DNA on Earth.

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If history is a guide, trade may be widespread among space-voyaging civilizations throughout the galaxy. Cultures that hate each other, still find common ground across a bartering table — as noted in this article blast from the past. #SETI

Sitting in the waiting room of my local auto repair, I honestly began to wonder if on some other far-flung planet, pointy-eared aliens would be listening for someone to sing out that they, too, were “Good to Go.”

Or, to them, would the sort of back and forth banter that we all take for granted in day-to-day business here on Earth seem as alien as ice cream? Would a highly-advanced civilization circling another sunlike star even need this sort of social lubricant?

Probably so, says Albert Harrison, a professor emeritus of social psychology at the University of California at Davis. “Every culture on Earth and many different species [here] depend at least in part on exchange and reciprocity,” said Harrison. Unless an off-world civilization has a complete “hive”-like mentality, he says it’s probably not a stretch to think that marketing, customer service and even social decorum (or at least some sort of etiquette and civility) would also play a role there as well.

Continue reading “Why E.T. Will Need Customer Service” | >

Kind of a light-hearted end of week meditation on what questions we might first pose to an extraterrestrial intelligence, if they were willing to sit for an interstellar town hall. Hope you enjoy.

If extraterrestrial (E.T.) intelligent civilizations are out there, given the age of the cosmos they stand a chance of being millions, or even billions of years ahead of us in almost every way. Assuming that we were even able to start a cosmic dialogue with them, I’ve often wondered what humanity should first ask such an advanced civilization.

Here are five sample questions:

— Who else is out there?

In other words, are they flitting about having galactic confabs or are they just as lonely as we are?

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Too soon to say whether Tabby’s Star, the Kepler star that garnered all the headlines late last year, actually harbors an alien megastructure or not. A new crowdfunding effort to fund global network of observations for the next two to three years should help resolve the matter. Don’t hold your breath.

Astronomers still can’t rule out the presence of an alien megastructure around Kepler star KIC 8462852 — located nearly 1500 light years away in the constellation of Cygnus. Strange dips in the star’s luminosity over four years of observations with NASA’s Kepler space telescope initially fueled such speculation, even though most of it was quickly dismissed.

But the currently most favored natural explanation for the strange light curves — a swarm of intervening planetary or cometary debris — remains largely unsatisfying. Thus, next month, a Kickstarter campaign will fund new ground-based observations to begin this summer that should bring more clarity to the situation.

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The author of “Alien Minds”, Susan Schneider of the University of Pennsylvania, has proposed a “greater age of alien civilizations” argument that says that “if extraterrestrial civilizations are millions or billions of years older than us, many would be vastly more intelligent than we are. By our standards, many would be superintelligent. We are galactic babies.”

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Venus, sometimes called Earth’s twin, is a hauntingly beautiful planet that likely had past microbial life a prominent astrobiologist asserts. If so, we need to go find it. NASA is developing the tech to withstand the high pressures and temperatures to do such a surface search.

I say there’s no excuse; Venus is closer than Mars; and while Mars may have harbored life as did Ceres, finding evidence of past life on Venus and then Mars later this century would mean that life itself evolves pretty readily.

Venus likely harbored past microbial life, if not on its exposed surface, then in the planet’s potential warm early oceans and hot pools of liquid water, Dirk Schulze-Makuch, a Washington State University astrobiologist now tells me.

Schulze-Makuch is less certain whether such long-dead microbes actually would have originated on Venus itself or have been delivered via meteorites from our own early Earth. But he does think it’s worth using a future Venus surface rover to look for such microfossils and/or their isotopic byproducts.

Continue reading “Venus Likely Had Past Life; Next Step Is Finding It” | >