The John Klein slabs contain very fine-grained sediments but are cut through with pale veins of what could be calcium sulphate.

BBC: Curiosity Mars rover spins its rock drill

The John Klein powder is less oxidized and therefore has a higher potential to preserve organic compounds, if they were originally present.

FORBES: First Curiosity Drilling Sample in the Scoop

The flat slabs of rock currently being investigated by the rover have been dubbed "John Klein", the name of a Curiosity engineer who died in 2011.

BBC: Curiosity Mars rover takes historic drill sample

Among these rocks is the candidate drill site, John Klein.

BBC: Curiosity Mars rover eyes rock drill site

The top Republican on the House education and labor committee, Rep. John Klein, R-Minnesota, expressed concern that tools to help students at struggling schools, such as tutoring, would move from required to optional.

CNN: Top issues: Education

The sample comes from a hole about 2.5 inches deep drilled on Feb. 8 in a flat plate of sedimentary bedrock that the space agency managers have named "John Klein" in memory of a Mars Science Laboratory deputy project manager who died in 2011.

WSJ: Rover on Mars Extracts First Rock-Core Sample

Deceptive simplicity is the hallmark of "The Weir, " which has just five characters, a bartender (Billy Carter), three regulars (Dan Butler, Sean Gormley and John Keating) and an outsider, a young woman named Valerie (Tessa Klein) who has moved to the rural village where the play is set to find peace and quiet.

WSJ: Truth Is Scarier | The Weir | Irish Repertory Theatre | The Master Builder | Brooklyn Academy of Music | By Terry Teachout

After I learned about Bribin You, I had a chance to connect with Amit Klein, the co-founder of Startup Giraffe, who connected me to John Cihocki, the builder of Bribin You, to discuss the tool and other lifehacks he recommends.

FORBES: New Tool, Bribin You, Allows You To Bribe People To Read Your Email With Real Money