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You Always Knew You Kept Your Legos for a Reason

Johns Hopkins engineers used Legos to model microfluidic arrays at more easily observable scale, reports Scientific Blogging. Researchers led by Joelle Frechette and German Drazer used small beads, a glycerol-filled tank, and Legos to see what happens on the micro- or nano-scale of a microfluidic array. "Our experiment shows that if you know one single parameter—a measure of the asymmetry in the motion of a particle around a single obstacle—you can predict the path that particles will follow in a microfluidic array at any forcing angle, simply by doing geometry," Drazer says. They report their results in Physical Review Letters.

The Scan

PLOS Papers on Frozen Shoulder GWAS, Epstein-Barr Effects on Immune Cell Epigenetics, More

In PLOS: genome-wide association study of frozen shoulder, epigenetic patterns of Epstein-Barr-infected B lymphocyte cells, and more.

Fertility Fraud Found

Consumer genetic testing has uncovered cases of fertility fraud that are leading to lawsuits, according to USA Today.

Ties Between Vigorous Exercise, ALS in Genetically At-Risk People

Regular strenuous exercise could contribute to motor neuron disease development among those already at genetic risk, Sky News reports.

Test Warning

The Guardian writes that the US regulators have warned against using a rapid COVID-19 test that is a key part of mass testing in the UK.