Get flash to fully experience Pearltrees
Download this and other animations for a single user or for an entire classroom . HowBig is also available as a ready-to-use PowerPoint® Slide Presentation . How to use: Use the left and right arrows to change magnification. Click on the magnifications (1, 10, 100...) for a "Power of Ten" zoom. Choose an individual cell or organism (right) to bring it into view.
No, this isn't a make-believe place.
The samples were collected from a part of Lechuguilla Cave in Carlsbad Cavern National Park in New Mexico that has been cut off from any input from the surface for four million to seven million years.
By MICHAEL HANLON
7 May 2012 Last updated at 10:43 By Ella Davies Reporter, BBC Nature
Sixty years after scientists described the chemical code of life — an interweaving double helix called DNA — researchers have found four-stranded DNA is also lurking in human cells. The odd structures are called G-quadruplexes because they form in regions of deoxyribonucleic acid (DNA) that are full of guanine, one of the DNA molecule's four building blocks, with the others being adenine, cytosine, thymine.
Researchers have discovered how the DNA is packed into our cells in such a way that the roughly 2 meters of DNA in each cell doesn’t tangle, and is easily accessible when it’s needed to make proteins.
Jan. 24, 2013 — New research reveals a potential way for how parents' experiences could be passed to their offspring's genes. The research was published January, 25 in the journal Science . Epigenetics is a system that turns our genes on and off.
Now scientists have discovered a vital clue to unraveling these riddles. The human genome is packed with at least four million gene switches that reside in bits of DNA that once were dismissed as “junk” but that turn out to play critical roles in controlling how cells, organs and other tissues behave. The discovery, considered a major medical and scientific breakthrough, has enormous implications for human health because many complex diseases appear to be caused by tiny changes in hundreds of gene switches.
Selected publications Baker, L.
By Jon Clinkenbeard .
Most bacterial infections can be treated with antibiotics such as penicillin, discovered decades ago.
Oct. 28, 2012 — Researchers have learned how a synthetic molecule destroys complexes that induce allergic responses -- a discovery that could lead to the development of highly potent, rapidly acting interventions for a host of acute allergic reactions. The study, published online Oct. 28 in Nature , was led by scientists at the Stanford University School of Medicine and the University of Bern, Switzerland.
A little-known plant with a truly bizarre name is now making headlines as a cancer killer, with the compound of the plant vanishing tumors in mice with pancreatic cancer.