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.Why do Ladybugs have Spots?
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| When you think of a ladybug, you probably have a picture in your mind of a little beetle that is bright red with several black spots on it. That is how most people picture ladybugs and these are the most well known of all of the ladybug species. What is the world's only immortal animal The turritopsis nutricula species of jellyfish may be the only animal in the world to be immortal. Jellyfish are free-swimming members of the phylum Cnidaria. Jellyfish have several different morphologies that represent several different cnidarian classes 'Immortal' jellyfish swarming across the worldAn 'immortal' jellyfish is swarming through the world's oceans, according to scientists. An 'immortal' jellyfish is swarming through the world's oceans, according to scientists. The Turritopsis Nutricula is able to revert back to a juvenile form once it mates after becoming sexually mature. Marine biologists say the jellyfish numbers are rocketing because they need not die. Dr Maria Miglietta of the Smithsonian Tropical Marine Institute said: "We are looking at a worldwide silent invasion." The jellyfish are originally from the Caribbean but have spread all over the world. Turritopsis Nutricula is technically known as a hydrozoan and is the only known animal that is capable of reverting completely to its younger self. It does this through the cell development process of transdifferentiation. Scientists believe the cycle can repeat indefinitely, rendering it potentially immortal. While most members of the jellyfish family usually die after propagating, the Turritopsis nutricula has developed the unique ability to return to a polyp state. Having stumbled upon the font of eternal youth, this tiny creature which is just 5mm long is the focus of many intricate studies by marine biologists and geneticists to see exactly how it manages to literally reverse its aging process The Age-Defying Jellyfish: Turritopsis nutricula Jump to Comments This jellyfish has evolved a rather nifty trick, after producing offspring instead of dying it simply turns into another little offspring itself. Though it’s been trumpeted elsewhere on the web as the immortal jellyfish, Turritopsis nutricula is in fact age-defying rather than immortal. If it is eaten or starves it will still die. But defying age is still quite the accomplishment – imagine if your grandparents could turn back into babies and go through life again! Turritopsis nutricula accomplishes this trick by a process called transdifferentiation. This is just a process where one type of cells turn into a different type of cells. Usually this process only happens during organ regeneration, but somehow this jellyfish has figured out how to use it to turn back the clock. Unfortunately I don’t think we’ll be able to copy their behavior any time soon! If you’d like to know more about Turritopsis nutricula Can we live forever?February 13, 2009 · 3 Comments
It is a desire that most people have and, while I don’t completely share it, I do understand. Everyone wants to live longer. Thanks to science, we have more than doubled the average lifespan of homo sapiens sapiens. But for some, that just isn’t enough. Is there any hope? Can we become like the products of our imagination, like Doctor Who and Highlander? Or are we stuck with the knowledge that every last one of us will eventually shuffle off this mortal coil? There may be hope. And it comes…in the form of a jellyfish.
So all we need to do is find out a way to, biologically, return to our sexual immaturity after we reproduce. It couldn’t be simpler! Or, perhaps, we should just come to terms with the fact that everyone dies, and live as best as we can while we’re here What causes lightning |
What causes lightning? | |
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| Lightning is produced in thunderstorms when liquid and ice particles above the freezing level collide, and build up large electrical fields in the clouds. Once these electric fields become large enough, a giant "spark" occurs between them, like static electricity, reducing the charge separation. The lightning spark can occur between clouds, between the cloud and air, or between the cloud and ground. As in the photo above, cloud-to-ground lightning usually occurs near the boundary between the updraft region (where the darkest) clouds are, and the downdraft/raining region (with the lighter, fuzzy appearance). Sometimes, however, the lightning bolt can come out of the side of the storm, and strike a location miles away, seemingly coming out of the clear blue sky. As long as a thunderstorm continues to produce lightning, you know that the storm still has active updrafts and is still producing precipitation. The temperature inside a lightning bolt can reach 50,000 degrees F, hotter than the surface of the sun. Objects that are struck by lightning can catch on fire, or show little or no evidence of burning at all. |
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Ever since humanity first realized that death was inevitable we have been trying to cheat it. Religion is the most obvious example of this. Without exception, the religions of the world have convinced their followers that they are immortal. And despite the evidence of our senses (and a rotting corpse is one big stinking piece of evidence) most of the world believes that, in one way or another, they will live forever.
