Scientists at Case Western Reserve University, Brown University, and several other collaborators are building an underground science lab where, in a 300-kilogram tank filled with liquid xenon, they hope to find dark matter -- the material that scientists believe was instrumental in helping to form the universe.
The deeper they go the better, so the universities are looking to Congress to fund the project, which will cost about $550 million. In addition to this lab, almost a mile deep, it requires building two additional chambers, each 8,000 feet below the surface.
The reason the research is being conducted so far below the earth's surface is to avoid cosmic rays,which interfere with experiments to find dark matter. The experiment hopes to detect the particles -- which are not themselves directly perceptible -- by measuring their gravitational effects on other particles.
The underground lab is located in Lead, South Dakota, in the former site of the Homestake Gold Mine. The deeper labs will be built starting in 2012 and finished by 2016.
Two glaring errors in this article:
1. The Homestake Mine is no where near Sioux Falls. It is near Rapid City, SD. Other side of the state folks!
2. The Homestake Mine was a GOLD mine, not coal.
Both of these errors show a lack of effort on the part of the author. Please do a little more work with your facts.
Do all scientists still believe in dark matter? We can't find it nor see it if we do find it, so we can only find it by it's affects on other particles. Seems like a "wild goose chase" to me.
I believe, what's pushing the universe at ever increasing speeds is the fact. There is nothing beyond the leading edge of the expanding universe. So, the push of dark matter is really the pull of emptiness or void beyond the edge of the existing, and expanding universe. DUH! We learned in grade school about Osmosis.
Do all scientists still believe in dark matter?
Theory does not predict dark matter. The need for dark matter results from the assumption that Newton's law of gravity is a UNIVERSAL law of gravity and also applies outside our solar system. When one tries to find observations outside our solar system to confirm that it is UNIVERSAL, then the observations do not agree - and show that Newton's does not apply there. Then the concept of dark matter and massive amounts of missing matter (a large fudge factor) was created to explain the observations and to provide the necessary gravity. Actually a simple equation shows that the product of the gravitational constant G and the central mass M is a linear function of distance r for the case of flat velocity rotation curves in spiral galaxies. The usual and wrong assumption that G is universally constant requires that the mass M must supply the distance component, thus dark matter. Actually G itself is invisible and only apparent through its effect on viable objects so that the distance dependence can also be an invisible part of the invisible G. The search for massive invisible matter has continued for over 7 decades, and I predict it will not be found to exist. A correct version of the gravitational constant is G=Gn+A*r and is also valid in our solar system where r is very small. It predicts and explains the problem of the NASA probes Pioneer 10 and 11 where a small additional attractive force towards the sun was confirmed by sensitive observations. It also explains gravitational lensing without dark matter. We should stop wasting time and money on the search for dark matter and concentrate on more vital problems.
Where have all the matter gone?
Long time passing
Where have all the energy gone?
Long time ago
The answer my friends
is flowing in the web
When will they ever learn?
When will they everrrrr learn?
The title is very misleading - they will be the Deepest Underground Laboratory IF they receive the funding and IF they finish it!
The current deepest (and cleanest!) underground laboratory is SNOLAB (formerly the Sudbury Neutrino Observatory) and is located in Sudbury, Ontario, Canada, 6800 feet underground!