ScienceIQ.com

Marmaduke and the Taco Bell Chihuahua Are Cousins

You would never think Marmaduke, the enormous great dane of the newspaper cartoons, and the tiny Taco Bell chihuahua are close relatives. But the fact is, ALL dogs are pretty close relatives. Scientists now believe that all dogs, including the semi-wild dingoes of Australia, Arctic huskies, Shetland sheepdogs, great danes and tiny chihuahuas, are ...

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Marmaduke
Biology

You Can Learn A Lot From A Microbe.

You can learn a lot from a microbe. Right now, a tiny critter from the Dead Sea is teaching scientists new things about biotechnology, cancer, possible life on other worlds. And that's just for ... Continue reading

YouCanLearnALotFromAMicrobe
Mathematics

How To Calculate The Volume Of A Right Cone

Cones are used every day for a variety of purposes. Perhaps the most useful application of the cone shape is as a funnel. For finding the volume, a cone is best viewed as a stack of circles, each one ... Continue reading

VolumeOfARight Cone
Biology

The Journey of the Monarchs

The life of Monarch butterflies is an amazing one. They develop as caterpillars from the roughly 400 eggs each mother lays on the underside of milkweed plant leaves. Then they spend their brief lives ... Continue reading

MonarchButterflies
Biology

Bioenergy Basics

Biomass (organic matter) can be used to provide heat, make fuels, and generate electricity. This is called bioenergy. Wood, the largest source of bioenergy, has been used to provide heat for thousands ... Continue reading

BioenergyBasics

Dark Energy Changes the Universe

DarkEnergyChangestheUniverseDark energy has the cosmoslogists scratching their heads. Observations taken by NASA's Hubble Space Telescope and future space telescopes will be needed in order to determine the properties of dark energy, which makes up about 70 percent of the universe. Probing dark energy, the energy in empty space causing the expanding universe to accelerate, calls for accurately measuring how that expansion rate is increasing with time. Dark energy is thought to drive space apart. Astronomers used NASA's Hubble Space Telescope to hunt for supernovae (an energetic explosive event that occurs at the end of a star's lifetime), using their brightness, astronomers could measure if the universe was expanding faster or slower in the distant past. In its search, Hubble discovered 42 new supernovae, including six that are among the most distant ever found.

The farthest supernovae show that the universe was decelerating long ago, but then 'changed gears' and began to accelerate. Albert Einstein coined the term 'cosmological constant' to represent the possibility that even empty space has energy and couples to gravity. Like other astronomers of the time, he thought that the universe was static and so proposed there was a repulsive force from space that kept the universe in balance. Einstein discarded his own findings in 1929, when Edwin Hubble found through his research that the universe was expanding and not static. Today, new data from Hubble may well prove Einstein was on the right track. The pull of gravity and the push of dark energy have been trying to outmuscle each other since the beginning of time. About seven billion years ago, dark energy got the upper hand because the universe had grown so large and matter (the source of gravity) had expanded and scattered.

Cosmologists believe about 70 percent of the universe consists of dark energy, 25 percent is dark matter, and only four percent normal matter (the stuff that stars, planets and people are made of). Hubble observations suggest the dark energy may be Einstein's cosmological constant, an energy percolating out of the vacuum of the space between galaxies. The energy of the universe is dominated by empty space emitting a repulsive form of gravity that is pushing the universe apart. But what does all this mean to Earth? Even if Einstein's theory was correct, we won't have to be concerned about the 'dark side' for about 30 billion years, according to Hubble researchers.