Wolfram Alpha launched on Monday and tech-loving people have taken the time this week to check it out. Prior to the launch, CNET wrote about the hardware that the "computational knowledge engine" is built on, namely a system made by R Systems from Dell hardware, called R Smarr, that can perform 39.6 trillion mathematical operations per second.

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US Attorney General Jeff Sessions is considering using DNA tests to determine relatedness between adult and child migrants, the Daily Caller reports.

Bloomberg reports that Brainstorm Cell Therapeutics plans to offer a treatment it is developing under the "right to try" law for hundreds of thousands of dollars.

In Nature this week: expansion of disease-resistance genes among long-lived oak trees, and more.

In a proof-of-concept study, researchers report being able to determine age from dried bloodstains, Discover's D-brief blog reports.