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A new report finds that immigrants are key to startup formation and job creation. So why does America make it so difficult for immigrant entrepreneurs to stay? Just in case you need more proof that America's immigration policies are damaging to innovation, a new report shows that immigrant entrepreneurs have founded nearly half of America's top venture-backed companies.

A new report finds that immigrants are key to startup formation and job creation.

(PhysOrg.com) -- A new chemical technique for depositing a non-crystalline form of silicon into the long, ultra-thin pores of optical fibers has been developed by an international team of scientists in the United States and the United Kingdom. The technique, which is the first of its kind to use high-pressure chemistry for making well-developed films and wires of this particular kind of silicon semiconductor, will help scientists to make more-efficient and more-flexible optical fibers. The findings, by an international team led by John Badding, a professor of chemistry at Penn State University, will be published in a future print edition of the Journal of the American Chemical Society.

SAN FRANCISCO -- The United States was battered this year by at least 12 natural disasters that each caused at least $1 billion in damages , the National Oceanic and Atmospheric Administration said yesterday. [More]

New report from United Health Foundation holds some surprises

All across the United States, nay all around the world, the message about higher education is uniform: More people should go to university. President Obama has repeatedly stated on record that "by 2020 America will once again have the highest proportion of college graduates in the world." The Lumina Foundation is working to increase the proportion of Americans with degrees to 60% by 2025 .

Scientists in the United States have come up with a tool for automatically analysing digital photographs , making it possible to gauge the extent to which images have been altered or retouched. [More]

By Meredith Wadman of Nature magazine The largest and most high-profile chimpanzee research centre in the United States has acknowledged to Nature that 137 infant chimpanzees have been born to federally owned animals under its care since 2000, despite a government moratorium on such births. [More]

New study reveals that more people are starting businesses as a source of higher income than out of opportunity. Necessity, not opportunity, is driving entrepreneurship, says a new report. The Global Entrepreneurship Monitor, a nonprofit research consortium, Monday released its latest National Entrepreneurial Assessment for the United States.

Most Americans who worry about cyberwarfare are concerned that it will be directed against the United States.

The East Coast of the United States isn't the first place that comes to mind as being at risk of tsunamis , but new sonar maps are now helping to show that these risks do exist. For about the past five years, researchers at the U.S. Geological Survey, along with other governmental and academic partners, have been gauging the potential for tsunamis generated by landslides in submarine canyons in the mid-Atlantic to strike the U.S.

WASHINGTON -- Our culture of sitting may be responsible for 173,000 cases of cancer each year, according to new estimates. Physical inactivity is linked to as many as 49,000 cases of breast cancer and 43,000 cases of colon cancer a year in the United States, said Christine Friedenreich, an epidemiologist at Alberta Health Services-Cancer Care in Canada. [More]

By Allison Martell and Barbara Lewis (Reuters) - The United Nations body responsible for civil aviation weighed in against the European Union's emissions trading scheme on Wednesday, increasing pressure on the EU to back down in what threatens to become a serious trade dispute. [More]

Claros Diagnostics has created the mChip, which can produce accurate test results from a single drop of blood in 10 minutes. A lab on a chip Many laboratory blood tests take several days to process.

How can the U.S. ease the process of starting a business