Exercise produces irisin — irisin might prevent Alzheimer’s, researchers say

Some hope for those who are struggling with the disease.

Photo credit: Bruce Mars on Unsplash
Surprising Science
  • Irisin, a hormone in the human body that is generated by muscle tissue and is carried throughout the body in the bloodstream, can play a part in Alzheimer's onset and effects.
  • In tests on mice, it has become clear that irisin plays a key part in memory and learning; the removal and subsequent adding back of the hormone showed dramatic changes in memory and learning.
  • Researchers think a supplement including the hormone is not far off for those who have Alzheimer's, to slow it down or even stop it.
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In one coal state, renewable energy is set to win by 2028

Indiana ranks 3rd in coal consumption, but a primary energy utility there just declared the end of coal by 2028

(DAVID YOUNG/AFP/Getty Images)
Surprising Science
  • Where politicians fail, economic realities mean renewables are far less expensive: A savings of $4 billion over the next 30 years
  • Indiana is 7th in coal production and 3rd in consumption; this is due to change rapidly
  • The big winners? Solar and wind energies
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Trolls undermine the credibility of authors and publications, researchers say

The impact of abusive comments is "significant."

Image source: Maxpixel
Surprising Science
  • It's well known that abusive comments online happen to women more than men.
  • Abusive comments, a new study finds, has a "significant" impact on the credibility of both authors and news outlets.
  • Some news organizations already heavily moderate or even ban comments entirely; this should underscore that effort.
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MIT scientists propose giant laser beacon to attract alien attention

The concept was likened to a porch light in our little neighborhood of the galaxy.

Image: MIT News
Surprising Science
  • It could be the thing that makes an intelligent alien civilization stop and look at us further
  • It's surprisingly not all that difficult to accomplish; a 100-foot diameter primary mirror and 1 to 2 megawatt laser is about what it takes.
  • The idea is to create a noticeable anomaly, rather than trying to directly target anything. But hold on a second... should we do this?
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