From Nvidia's record $4 trillion valuation to robot surgeons, check out this week's awesome tech stories from around the web.

Personalized, brain-based tools could support learners being left behind due to natural differences in how their brains work.

Bioprinting holds the promise of engineering organs on demand. Now, researchers have solved one of the major bottlenecks—how to create the fine networks of blood vessels needed to keep organs alive.