It’s impossible to talk about “Lamb,” the Icelandic creature thriller, without revealing its central theme. Co-written by first-time-writer/director Valdimar Jóhannsson, who used to work as a special effects crew for Hollywood blockbusters like “Rogue One: A Star Wars Story” and “Prometheus,” and Icelandic poet Sjón, “Lamb” might be the oddest film you will ever see […]