It means that totally new creatures that didn't exist before 01.01.2007. Yes, you have heard correctly.
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Today, there are an estimated 350,000 known species of beetle on Earth, and probably several million more yet to be discovered, say scientists. The insects account for about a quarter of all life forms on the planet.
The new research shows that modern beetle lineages go back further than anyone suspected, even pre-dating the emergence of flowering plants. Previously it had been assumed that the beetles' success story was partly due to flowers which started to bloom in the Cretaceous period, from around 140 million years ago.
Flowering plants were thought to have provided beetles with new sources of food and habitats.
But according to the latest findings many of today's beetle families originated during the earlier Jurassic period, which also saw the appearance of the first major groups of dinosaurs.
Beetles first entered the fossil record in the Lower Permian period, nearly 300 million years ago.
Study leader Professor Alfried Vogler, from Imperial College London and the Natural History Museum, said: "The large number of beetle species existing today could very well be a direct result of this early evolution and the fact that there has been a very high rate of survival and continuous diversification of many lineages since then."
Prof Vogler's team used DNA sequencing and fossil records to compile a comprehensive evolutionary "family tree" for beetles.
By comparing the DNA of 1,880 different beetle species, the scientists were able to identify those which descended from a common ancestor. Fossils of known ages were used to date key moments of evolution and diversification on the ancestral tree.
While the dinosaurs became extinct 65 million years ago, beetles have continued to flourish, evolving into a plethora of different shapes and sizes.
"These odds are extremely unusual. We frequently work with really long odds when we track ... threatening asteroids," said Steve Chesley, an astronomer with the Near Earth Object Program at NASA's Jet Propulsion Laboratory.
The asteroid, known as 2007 WD5, was discovered in late November and is similar in size to the Tunguska object that hit remote central Siberia in 1908, unleashing energy equivalent to a 15-megaton nuclear bomb that wiped out 60 million trees.
Scientists tracking the asteroid, which is halfway to Mars, initially put the odds of impact at 1 in 350 and increased the chances this week after analyzing the data. Scientists expect the odds to diminish again early next month after getting new observations of the asteroid's orbit, Chesley said.
"We know that it's going to fly by Mars and most likely going to miss, but there's a possibility of an impact," he said.
If the asteroid does smash into Mars, it'll likely aim near the equator close to where the rover Opportunity has been exploring the Martian plains since 2004. The robot is not in danger because it lies outside the impact zone. Speeding at 8 miles a second, a collision would carve a hole the size of the famed Meteor Crater in Arizona.
In 2004, fragments of the comet Shoemaker-Levy 9 smacked into Jupiter, creating a series of overlapping fireballs in space. Astronomers have yet to witness an asteroid impact with another planet.
"Unlike an Earth impact, we're not afraid, but we're excited," Chesley said.
Source : AOL News
egg in bottle...science experiment egg bottle napoleon dynamite
your very own backyard hydrogen fuel , those use to power hybrid cars (except mines 1000times weaker)...Science experiment homemade hydrogen fuel oxygen atoms Electrolysis
! UGH! At least now she can pronounce vinegar and hypothesis! :)...Funny science experiment hysterical School balloon marissa dirty armpit laughing experiment. Ok, so this STILL makes me laugh! My daughter's science experiment from three years ago.Marissa was 10 years old November 2004. It was going SO bad! Besides her itching her armpit, and then the stupid balloon not doing a darn thing.......the balloon starts to take on a "ahem" life of it's own! Second time around you can see she didn't even add the baking soda in (she faked it) because I already did to try to get it right! Finally in the end (and after a lot of edits and cuts) we got a finished video for school! I couldn't bare to send this entire one in to class with her! :) It almost seemed DIRTY! :)Yes, that is ALSO our parrot in the back round! UGH! At least now she can pronounce vinegar and hypothesis! :) (more) (less)
Light the candles then put something over it. Example mason Jar. In this experiment we used a beaker. Put the jar over the flames. The jar You take some water in some pan and a couple of candles. Light the candles then put something over it. Example mason Jar. In this experiment we used a beaker. Put the jar over the flames. The jar will cause the flames to extinguish and then the water will rise into the beaker. (more) (less)
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Andrik's science experiment in 2006 on static electricity. See our link at http://esomething.blogspot.com/2006/06/science-exp eriment
of experiment before you will know what I mean. But it was made for a kids TV show so they won't know the difference...science This didn't work out quite how we had expected it to, for anyone who has seen this type of experiment before you will know what I mean. But it was made for a kids TV show so they won't know the difference (more) (less)
science experiment known as the \Balancing Butterfly\". In this clip...learn how to cut and color the butterfly before beginning center of gravity experiment
science project that is extrememly cute and educational. Brought to you by www.Do-it-myself.com...cute funny science sound waves experiment
Here's a simple kid's science experiment to illustrate that CO2 gas is heavier than air. It takes a little practice but once you've got it down it's
things -- the phytoplankton algae.