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MRI Could Solve Cellphone Radiation Problems

Imaging technique can now map how cellphone radiation heats the brain

4 min read
jarred cow brains used to test whether MRI scans can map the heat generated by cellphone radiation
Photo: David H. Gultekin and Lothar Moeller / PNAS

jarred cow brains to test whether MRI scans can map the heat generated by cellphone radiation

Photo: David H. Gultekin and Lothar Moeller / PNAS
Zombie Bait: Scientist use jarred cow brains to test whether MRI scans can map the heat generated by cellphone radiation. Click on image to enlarge.

19 December 2012—Years of studies to determine whether cellphones can cause brain tumors have yielded one popular consensus: More studies are needed. One important piece that has been missing from researchers’ arsenals is a way to see what happens to cellphone radiation that is absorbed by the human brain. Two scientists have now developed a magnetic resonance imaging (MRI) technique that they say could solve that problem. This could be an important tool for researchers who are trying to discover whether extensive cellphone use can cause brain tumors or other health problems.

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Why the Internet Needs the InterPlanetary File System

Peer-to-peer file sharing would make the Internet far more efficient

12 min read
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Carl De Torres
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When the COVID-19 pandemic erupted in early 2020, the world made an unprecedented shift to remote work. As a precaution, some Internet providers scaled back service levels temporarily, although that probably wasn’t necessary for countries in Asia, Europe, and North America, which were generally able to cope with the surge in demand caused by people teleworking (and binge-watching Netflix). That’s because most of their networks were overprovisioned, with more capacity than they usually need. But in countries without the same level of investment in network infrastructure, the picture was less rosy: Internet service providers (ISPs) in South Africa and Venezuela, for instance, reported significant strain.

But is overprovisioning the only way to ensure resilience? We don’t think so. To understand the alternative approach we’re championing, though, you first need to recall how the Internet works.

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