Coming Home

It should come as little surprise to readers of this blog, despite the fact that I attempted to fly under the radar, that I have been in Yemen for the past three weeks. But I am now on my way home and posting should resume as normal on Monday.

I owe a special thanks to all of the many people, the vast majority of whom do not wish to be named for various reasons, that kindly agreed to meet with me and talk with me over the past few weeks. I learned a great deal, as is always the case. It was also nice to meet so many readers of the blog - see I knew you guys (and gals) existed even if you don't comment.

There are a number of things that I learned that I will be discussing further in writings and talks over the next couple of months. Stay tuned.

3D printing might save your life one day. It's transforming medicine and health care.

What can 3D printing do for medicine? The "sky is the limit," says Northwell Health researcher Dr. Todd Goldstein.

Northwell Health
Sponsored by Northwell Health
  • Medical professionals are currently using 3D printers to create prosthetics and patient-specific organ models that doctors can use to prepare for surgery.
  • Eventually, scientists hope to print patient-specific organs that can be transplanted safely into the human body.
  • Northwell Health, New York State's largest health care provider, is pioneering 3D printing in medicine in three key ways.
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Permafrost is melting 70 years earlier than expected in Arctic Canada

It's a "canary in the coalmine," said one climate scientist.


MARK RALSTON/Contributor
Surprising Science
  • A team of researchers discovered that permafrost in Northern Canada is melting at unusually fast rates.
  • This could causes dangerous and costly erosion, and it's likely speeding up climate change because thawing permafrost releases heat-trapping gasses into the atmosphere.
  • This week, Canada's House of Commons declared a national climate emergency.
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Has a black hole made of sound confirmed Hawking radiation?

One of Stephen Hawking's predictions seems to have been borne out in a man-made "black hole".

Image source: NASA/JPL-Caltech
Surprising Science
  • Stephen Hawking predicted virtual particles splitting in two from the gravitational pull of black holes.
  • Black holes, he also said, would eventually evaporate due to the absorption of negatively charged virtual particles.
  • A scientist has built a black hole analogue based on sound instead of light.
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Watch scientists melt a satellite part to save us from space junk

Not every part of a satellite burns up in reentry. Considering the growing number of satellites in orbital space, that's a big problem.

Technology & Innovation
  • Earth's orbital space is getting more crowded by the day.
  • The more satellites and space junk we put into orbit, the greater a risk that there could be a collision.
  • Not all materials burn up during reentry; that's why scientists need to stress test satellite parts to ensure that they won't become deadly falling objects.
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