Do you speak Dothraki? Conlanger David J. Peterson does, and he’s here to teach us how. Plus, in this edition of Science Goes to the Movies, we take a look at “The Martian.”

A new book about one writer’s penchant for poisoning her characters. Plus, sneaker technology, the cost of generic drugs, truth-telling trash talk, and more.

Who was Alexander von Humboldt? Plus, moon-viewing tips, mapping neutrinos, a science journalist’s journey with Parkinson’s disease, and more.

Paleoanthropologists hit pay dirt in a South African cave. Plus, the impact of reading on child development, a conversation with former congressman and AAAS head, Rush Holt, and more.

Remembering Oliver Sacks, gene therapy to treat colorblindness in monkeys, teachers describe their science-filled summer vacations, the history of autism, and more.

The SciFri Book Club discusses “The Soul of a New Machine,” attempting to replicate 100 psychology studies, a new view of black holes from Stephen Hawking, and more.

Are your employers gathering data about you? Plus, a museum unites artists and technologists, seismologist Lucy Jones talks earthquakes, using urine as garden fertilizer, and more.

How does forest vegetation shift after catastrophic fires? Plus, an update on the Gold King mine disaster, surprising behaviors in a rare octopus, assistive technology apps, and more.

The SciFri Book Club reboots with “The Soul of a New Machine.” Plus, a look at President Obama’s Clean Power Plan, baby jokes, rats on the job, and more.

Rethinking school discipline, the evolution of wearable technology, how illegal pot farms are repeating old environmental sins, and more.