Ubiquitous in many classrooms since the 19th century, chalk and chalkboards are familiar to most of us. White, powdery and prone to sticking to those surfaces where it is put and just as easy to wipe away, chalk and its accompanying board are excellent instructional aids. Notably, however, most chalk today isn’t technically chalk at all, but gypsum.
Read more at: Blackboard Chalk Isn’t Chalk.
“What is it?” asked the ads for Barnum’s exhibition. “Is it a Statue? Is it a Petrification? Is it a Stupendous Fraud? Is it the Remains of a former Race?”
We’ve just passed the 145th anniversary of the “discovery” of the Cardiff Giant, which caused a stir throughout the United States. What’s the gypsum connection? You’ll find out in this brief and entertaining account of the madness at History.com.
The little white whiptail lizard, the southern plateau lizard, and the bleached lesser earless lizard are the three species of white lizards found on the gypsum fields. According to Burkett, white lizards are most likely the same species as their colored counterparts, but have adapted to the color of the gypsum dunes to avoid predation.
As many as 20,000 property owners in Louisiana, Florida, Alabama, Mississippi, Texas and Virginia installed the toxic drywall during frenzied building after Hurricanes Katrina and Rita and a nation-wide housing boom.
Homeowners complained of foul odors, damage to appliances, health issues such as skin irritation and breathing problems and blackening of copper and silver they say is connected to the product.
Knauf Plasterboard Tianjin settled with 4,500 property owners, mostly from the Gulf Coast, for damages reaching $1 billion, including an estimated $280 million to $350 million for Louisiana residents.
Taishan Gypsum has resisted the authority of U.S. courts, arguing the judicial system has no authority over the foreign company. Last month, the firm refused to show up for a hearing in U.S. District Judge Eldon Fallon’s New Orleans courtroom after a judgment against the company was made final.
The short answer: Yes!
“We suggest that gypsum on Mars would have entrapped, as solid inclusions and within fluid inclusions, any microorganisms and/or organic compounds that were present in its parent waters,” they note. “Therefore, fluid inclusions and solid inclusions hosted by salt minerals may be the best place to continue the search for life on Mars.”