What we all feared: jellyfish are immortal

A species of jellyfish, Turritopsis nutricula, may be the world's only known immortal species, according to scientists. Apparently the hydrozoan can vacillate between youth (polyp) and adult stages of growth--prolonging it's unusual, eldritch existence. From  WorldHealth.net:

Through this process - called transdifferentiation - the jellyfish is able to return to its polyp state, the first stage of the life of a jellyfish. During transdifferentiation, its cells can become completely transformed. For example, a muscle cell could become a nerve cell - even an egg. The jellyfish then reproduces asexually and breed hundreds of jellyfish that are identical to the original adult. This process can be repeated - again and again, but only as an emergency measure. As Dr Maria Miglietta of the Smithsonian Tropical Marine Institute says, "We are looking at a worldwide silent invasion."

Upside: they're the size of a human pinky fingernail
Downside: THEY'RE IMMORTAL!!

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Also at TimesOnline

Two-Story Tall Fungus Fossils Found

Image: Mary Parrish via MSNBC

Researchers say that waaaay back in the Silurian and Devonian periods (350-420 million years ago....you remember those from science class, right?) the world's largest fungus grew to around 26 feet tall--about the size of modern telephone poles. The fungus, called Prototaxites, was about the width of a tree trunk. From MSNBC:

"The above-ground structure -- what actually gets preserved as a fossil -- would have been involved in spore dispersal, like a mushroom," he added. "For that purpose, the higher off the ground you can get, the farther spores will travel on the wind."

He and his colleagues first began to suspect Prototaxites was a fungus and not a plant after they analyzed carbon isotopes in its fossils. These remaining carbon atoms can suggest what existing, and once-living, organisms ate. Boyce explained that since plants derive their energy from the sun and its carbon from carbon dioxide in the air, the carbon isotope signatures for plants tend to look the same.

Kinda cool, let's face it, also kinda creepy!
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Scientists Discover Micro-organisms That Don't Need Oxygen

Image: R. Danovaro et al., BMC Biology

Okay, this is getting nerdy, but it's still cool. (Science is ALWAYS cool!). Researchers have discovered the first micro-organism (animal) that doesn't need oxygen to survive. The organism dubbed Loricifera, was found on the L'Atalante basin in the Mediterranean.From Science American Association for the Advancement of Science (AAAS):

The creature's cells apparently lack mitochondria, the organelles that use oxygen to power a cell. Instead they are rich in what seem to be hydrogenosomes, organelles that can do a similar job in anaerobic (or oxygen free) environments. The find could help scientists understand what life might have looked like in the earth's early oceans, which also had very little oxygen.

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New "Goldilocks" exoplanet discovered

Image: Instituto de Astrofísica de Canarias via ScienceNews

The first observable exoplanet, within an "Goldilocks Zone" has been discovered! This is a HUGE discovery as planets within the zone are considered excellent candidates for supporting life due to their not-too-close/not-to-far distance from their parent star. This "just right" distance allows for liquid water to exist on the surface--making for a comfy environment for life to flourish.

The planet, a gas giant roughly the size of Jupiter or Saturn, is designated as COROT-9b, but it's thought that if Jupiter can have moons, then why not COROT? The moons could be habitable, even if the main planet is not.

While other Goldilocks planets have been discovered, COROT is a diamond in the rough because it's much more easily observable from Earth. From ScienceNews:

Although a number of extrasolar planets with moderate temperatures have been discovered, only a planet that passes in front of — or transits — its star can be studied in depth. The starlight that filters through the atmosphere of the planet during each passage reveals the orb’s composition, while the amount of starlight that is blocked outright indicates the planet’s size.

All the other transiting planets seen so far have been “weird — inflated and hot” because they orbit so close to their stars, notes study collaborator Didier Queloz of the Geneva Observatory in Sauverny, Switzerland. Deeg, Queloz, and their colleagues report their findings in the March 18 Nature.

The planet is 1,500 light years away  (in the constellation Serpens), so it will be a while before we get to stop in on the neighbors and say hello!

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