Killing Cancer With Heat
Cancer research has found that injecting mice with tiny magnets and turning up their body heat eliminated tumors from the animals' bodies with no apparent side effects.
What's the Latest Development?
That cancer cells can be killed with heat has been known for some time. The trick has been targeting the cancer cells so that the body's healthy cells do not die along with them. "One promising idea, known as magnetic hyperthermia, involves injecting minuscule 'nanoparticles,' basically microscopic lumps of iron oxide or other compounds, into tumors to make them magnetic. ... The magnetic nanoparticles are excited by the applied field and begin to get hot, heating and potentially destroying the surrounding cancer tissue. Because healthy tissue is not altered by the magnetic field, it does not heat up and is not damaged."
What's the Big Idea?
A major focus of nanotechnology has been its role in treating cancer. Nanoengineer Naomi Halas of Rice University in Houston, Texas, is impressed. "This group has solved the key impasse that has arrested the development of magnetic nanotherapies, that is, the weak response of the nanoparticle to the applied magnetic field," she says. "I am so happy that more of these types of nanoparticle-based hyperthermal therapies are being developed to increase the arsenal of weapons against cancer."
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It's one of the most consistent patterns in the unviverse. What causes it?
- Spinning discs are everywhere – just look at our solar system, the rings of Saturn, and all the spiral galaxies in the universe.
- Spinning discs are the result of two things: The force of gravity and a phenomenon in physics called the conservation of angular momentum.
- Gravity brings matter together; the closer the matter gets, the more it accelerates – much like an ice skater who spins faster and faster the closer their arms get to their body. Then, this spinning cloud collapses due to up and down and diagonal collisions that cancel each other out until the only motion they have in common is the spin – and voila: A flat disc.
Both panoramic and detailed, this infographic manages to show both the size and distribution of world religions.
- At a glance, this map shows both the size and distribution of world religions.
- See how religions mix at both national and regional level.
- There's one country in the Americas without a Christian majority – which?
Do you have a magnetic compass in your head?
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