Each component of a phone has tiny transistors that work to build something amazing. This is my old phone with removed battery and camera for visual effects. What'd you think I should do with it?

The theory that comets delivered the molecular building blocks for life on Earth is a long-standing one, since comets are known to carry many of these molecules.

However, a new study challenges this idea

The researchers, led by the University of Cambridge, found the cometary delivery of these building blocks would be—at best—a 'one-off fluke,' and not the steady rain of prebiotic molecules that had been theorized.

Using computer modeling, the researchers determined that comets travel too fast and at too sharp an angle to Earth's atmosphere for the fragile organic molecules to survive: they would almost certainly vaporize on impact with the surface.

However, the researchers also found that another planet in our system—Mars—could be a slightly more promising candidate for cometary delivery of prebiotic molecules, although this is still highly unlikely. The results are published in the journal Scientific Reports.

"Historically, scientists thought that comets were important for the origin of life on Earth, because they carried carbon- and nitrogen-bearing molecules, so these giant space snowballs were almost like a 'get out of jail free card' that brought all the molecules a planet would need to seed life," said lead author Dr. Richard Anslow from Cambridge's Institute of Astronomy.

"It's kind of a romantic idea, but our results suggest it's highly unlikely."

The new study shows just how rare that scenario is. The researchers used recent advances in comet impact simulations, comet-atmosphere interactions and dynamic modeling of the origin and evolution of comets to conduct their study.

Taken together, the researchers found that while the successful delivery of prebiotic molecules cannot be ruled out completely, it would be extremely unlikely.

The number of comets hitting the Earth declined rapidly in our planet's first 500 million years, and there were, at most, a handful of opportunities in Earth's early history for HCN delivery on a comet.

Even if HCN carried on a comet made it to the Earth's surface, it would not have stayed concentrated for long, meaning that any prebiotic chemistry would have needed to progress very quickly from impact, which the researchers say is highly unlikely.

"It would really have to be a one-in-a-million occurrence, because not only would you need an impact at just the right speed and just the right angle, you would also need everything to happen after that point, in terms of the concentration and the speed at which the chemical origins of life got going," said Anslow.

​"We can't rule out for certain that it happened that way. But it seems to be a really rare occurrence—at best, a one-off fluke."

The chain fountain phenomenon (also called the Mould effect) happens when a long chain falls from a container. As the links move, they create an upward force that makes the chain rise into the air before falling down — forming a surprising fountain-like arc. A simple but fascinating example of momentum and inertia in action.

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Scientists have proposed what they believe is the first method for detecting "mirror life"—a hypothetical form of life made from molecular building blocks that are the mirror image of those found naturally on Earth.

Researchers at the University of Strathclyde and the Department of Chemistry at Durham University have outlined a new approach that could identify mirror organisms using molecules which emit left- and right-handed light.

This provides a possible future surveillance tool should the ability to create such organisms ever emerge. The work is published in the journal Royal Society Open Science.

Mirror life is considered a low-likelihood but potentially high-severity biosecurity threat. There are international concerns that artificially created mirror organisms could interact with the natural world in unpredictable ways and potentially evade some of the biological defenses which protect humans, animals and plants.

Scientists have called for restrictions on research aimed at creating the self-replicating mirror organisms. The potential risks have also been considered by governments and international organizations.

Even though left- and right-handed molecules have exactly the same atoms in the same order, they interact differently with living bodies.

While one version of a medicine might cure an illness, the mirror-image version may do nothing or cause harm.

The researchers, who stress that mirror life does not currently exist and their proposed method is intended as a contingency measure, use an approach involving circularly polarized luminescence (CPL). A property of light, it can reveal information about the "handedness," or chirality, of molecules and biological structures.

Palau is a West-Pacific island nation in which daily life, culture and economy were bound to the sea for millennia; the reason why 80% of its maritime territory remains national heritage, thus maintaining pristine emerald green islands and turquoise waters. Uncover the fascinating Palauan society still ruled by traditional tribal chiefs, the ecological efforts of the national government to preserve such beauty, and the exotics behind Ngerukewid, one of the earliest wildlife reserves in the whole of Oceania.

Check out my blog post for more--> Ngerukewid: Palau's Unspoiled Maze Of Seventy Islands