MI weekly selection #375

Ridges on moon may indicate tectonic activity

Scientists who studied temperature data from a NASA orbiter say ridges on the moon may be evidence of recent tectonic activity. “From this paper, it appears that the moon may still be creaking and cracking — potentially in the present day — and we can see the evidence on these ridges,” said study co-author Peter Schultz.


X-rays of 16th-century armor show brass-making methods

X-rays of chain mail armor from the English warship Mary Rose, which was sunk in a battle with France in 1545 and recovered in 1982, show how advanced brass production was for the time. “This knowledge can inform the conservation strategies employed when treating such materials from a marine environment,” researchers wrote.

Ars Technica

Shock waves from asteroid may have caused 1908 blast

A 1908 explosion over the Podkamennaya Tunguska River in a remote part of Siberia may have been caused by shock waves from an iron asteroid that passed through the atmosphere before heading back into space. The explosion, which devastated 202,343 hectares of forest and is considered the biggest impact event in recorded history despite the lack of a crater, may have occurred when iron in the asteroid rapidly turned to gas, researchers say.


Satellite images map ice loss in Greenland, Antarctica

Scientists used images from NASA’s ICESat-2 satellite to map ice loss in Greenland and Antarctica between 2003 and 2019. The melting, which included an average ice loss of 200 gigatons per year in Greenland and 118 gigatons per year in Antarctica, caused a 14-millimeter increase in sea level during the 16-year period.


AI predicting, diagnosing Alzheimer’s

An artificial intelligence algorithm combining brain MRI scans along with cognitive test, age and gender data enabled accurate prediction of Alzheimer’s disease risk, as well as yielded slightly better performance in diagnosing Alzheimer’s, compared with neurologists.


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