Inside the NSA’s Secret Tool for Mapping Your Social Network

Edward Snowden revealed the agency’s phone-record tracking program. But thanks to “precomputed contact chaining,” that database was much more powerful than anyone knew.
https://bit.ly/3gglRj3

During Pregnancy, the Placenta Hacks the Immune System to Protect the Fetus

Cells in the placenta have an unusual trick for activating gentle immune defenses and keeping them turned on when no infection is present. It involves crafting and deploying a fake virus. https://www.wired.com/story/during-pregnancy-the-placenta-hacks-the-immune-system-to-protect-the-fetus/?utm_source=dlvr.it&utm_medium=blogger

The Incredible Physics of Simone Biles' Yurchenko Double Pike

Calculating angular velocity and the moment of inertia isn’t quite as hard as competing in the Olympic gymnastics tournament—but it’s pretty darn tough. https://bit.ly/3kUqrIr

You Need a Password Manager. Here Are the Best Ones

Keep your logins locked down with our favorite apps for PC, Mac, Android, iPhone, and web browsers. https://bit.ly/3zrMjjY

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