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Need a New Knee or Hip? A Robot May Help Install It

As more people strive to stay active on aging frames, robots and other technologies are likely to play a wider role in helping surgeons replace joints.

After Barring Trump, Facebook and Twitter Face Scrutiny About Inaction Abroad

Human rights groups and activists have spent years urging the companies to do more to remove content that encouraged violence.

The Alternate Reality of Fringe Apps

Facebook and Twitter have kicked out the online horribles. Are they going where we can’t find them?