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Tuesday Headlines: America’s tortured brow.

What had happened to so many of these working dads and moms, that they could see a girl freezing in a concrete room and laugh? How could these regular Americans tell a boy his fingers would be severed if he disobeyed? Where some seek to help, others are fine with harm. Attitudes toward migrants are a test of American values.

Trump lied last night, claiming border patrol officers were hurt in the conflict at the US-Mexico border and that the caravan includes “over 500” criminals, including kidnappers.

How Fox News is providing cover for the tear-gassing of migrant children: It's an "invasion" and you can season tacos with pepper spray.

The American Academy of Pediatrics issues a statement on the tear-gassing: “Immigrant children are still children, and they deserve our compassion and assistance. We will continue to speak out against their inhumane treatment and advocate for their safety.”

Conservatives think Americans disagree about what racism means. What they don’t realize: Racism is a white problem.

Over the past decade, attackers motivated by right-wing political ideologies have committed dozens of shootings, bombings and other acts of violence, far more than any other category of domestic extremist.

Mueller's office has accused Paul Manafort of violating his plea deal by lying to prosecutors and the FBI during recent debriefings.

Related: Manafort secretly met with Wikileaks’s Julian Assange inside the Ecuadorian embassy in London multiple times between 2013 and 2016.

The FDA says it’s now safe to eat some romaine, but only if you check its labeling.

Before the 1906 Pure Food and Drug Act, US food providers weren't held accountable for safety, even in cases where people died.

Scientists and medical experts have chosen not to use the technology on human beings because of uncertainties, risks, and most importantly, the ethical problems that follow. Such irreversible alterations on human genes will inevitably go into the human gene pool. More than 100 Chinese scientists have signed a letter condemning the CRISPR experiments on human embryos.

The Oatmeal explains the mole that NASA just landed on Mars.

Members of Saudi Arabia's ruling family and senior US officials are pushing for the crown prince's brother to become king.

A cross-section of hell, circa 1855, and some other "persuasive maps."

Turnout in the 2018 midterms looks to be 49.3% of the voting eligible population—the highest midterms turnout in over 100 years.

California-style conservatism—being against everything liberal, but not really for anything—has taken over conservative ideology.

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Analysis of thousands of questions posed to Dear Abby identifies some common concerns. Top among them, sex and religion.

The agriculture industry's latest answer to a diminishing supply of immigrant labor: robots.

Catalogs from a 19th-century Japanese fireworks manufacturer.

A small bookstore celebrates selling a book that had been sitting on a shelf for nearly three decades.

Your weekly white paper: A deep-learning algorithm can predict age and gender from retinal photographs.

“They’ve figured out a market that nobody else really knows exists. They’re exploiting a market in a way that is definitely taking advantage of something they discovered. They’re businessmen, really.” An introduction to “courtsiding,” the practice of quickly transmitting data from a tennis match for purposes related to gambling.

Video: A clip from David Lynch’s sitcom Rabbits (2002), which clinical psychologists have used to make study participants "feel unpleasantly uncomfortable."

Beautiful, detailed photos of leaves in Oaxaca, by Amaury Barrera.

Over 13,000 pubs—nearly one in four—have closed in the UK since 2001, mainly due to household finances and the rise of chains.

A list of dearly departed Google products, along with their causes of death.