Vitamin D apparently has nothing to do with skin color

This article is a reminder that in science, nothing is certain until you have evidence (even then, nothing is totally certain): In human evolution, changes in skin's barrier set northern Europeans apart -- ScienceDaily. The popular idea that northern Europeans developed light skin to absorb more UV light so they could make more vitamin D -- vital … Continue reading Vitamin D apparently has nothing to do with skin color →

Ancient baby boom holds a lesson in over-population

Along the lines of last week's discussion of Jared Diamond's book 'Collapse': Ancient baby boom holds a lesson in over-population -- ScienceDaily. Washington State University researchers have sketched out one of the greatest baby booms in North American history, a centuries-long "growth blip" among southwestern Native Americans between 500 to 1300 A.D. It was a time … Continue reading Ancient baby boom holds a lesson in over-population →

Court Says Some Employers Don’t Have to Cover Birth Control

There is a lot of discussion over the US Supreme Court's decision: Court Says Some Employers Don't Have to Cover Birth Control | Political Wire. The U.S. Supreme Court, in a 5-4 split, ruled that "closely held" companies can on religious grounds opt out of a federal health-care law requirement that companies provide contraception coverage for employees, the Wall Street … Continue reading Court Says Some Employers Don’t Have to Cover Birth Control →

Sean Carroll makes the case for the Many-worlds interpretation of quantum mechanics

Sean Carroll has posted a passionate defense of the Many-world interpretation to quantum mechanics. I have often talked about the Many-Worlds or Everett approach to quantum mechanics — here’s an explanatory video, an excerpt from From Eternity to Here, and slides from a talk. But I don’t think I’ve ever explained as persuasively as possible why I think it’s the right approach. So that’s what … Continue reading Sean Carroll makes the case for the Many-worlds interpretation of quantum mechanics →

Naomi Oreskes: Why we should trust scientists

This excellent TED talk by Naomi Oreskes covers many of the same topics we've discussed before, concerning the limitations of scientific expertise, why scientists trust experts in other fields, and why lay people should trust scientific consensuses. http://www.youtube.com/watch?v=RxyQNEVOElU via Naomi Oreskes: Why we should trust scientists | Talk Video | TED.com. Of course, trusting science is … Continue reading Naomi Oreskes: Why we should trust scientists →

Quantum computing 101with D-Wave’s Vern Brownell

http://www.youtube.com/watch?v=Mq-mRNaV-sc I found this to be an interesting primer on quantum computing.  One take away for me is that quantum processors will be useful for specific purposes, not necessarily as general purpose devices.  This implies to me that we might someday have computers with separate quantum processors with specific jobs delegated to it by the classic … Continue reading Quantum computing 101with D-Wave’s Vern Brownell →

New NASA images highlight U.S. air quality improvement

As something of a balance against the environmental issues we've been discussing, here is an encouraging sign of progress: New NASA images highlight U.S. air quality improvement -- ScienceDaily. Anyone living in a major U.S. city for the past decade may have noticed a change in the air. The change is apparent in new NASA satellite images … Continue reading New NASA images highlight U.S. air quality improvement →