Skeptic Check: Blue Light Special

CRISPR Mosquitoes

Jul 6, 202654 minSummary

This episode of Big Picture Science explores the revolutionary potential and complex ethical landscape of CRISPR and gene-editing technologies. The hosts investigate how scientists are currently utilizing genetic tools to address public health crises, specifically focusing on the control of disease-carrying mosquitoes. Through an interview with Dr. Nathan Rose of Oxitec, the discussion highlights how gene-limiting technology—which differs from CRISPR—is being used to reduce populations of invasive mosquitoes that transmit Zika, dengue, and malaria, providing a targeted alternative to chemical insecticides. Beyond the practical applications in pest control, the episode delves into the broader implications of CRISPR in human medicine. Law professor Hank Greely provides expert insight into the distinction between somatic and germ-line editing, emphasizing the rapid, accessible nature of CRISPR compared to previous methods. The conversation examines the immense promise of gene therapy for treating genetic conditions like sickle cell anemia, while simultaneously addressing the ethical dangers of human embryo editing. By balancing the excitement of medical breakthroughs with the necessity for rigorous safety and ethical oversight, the episode offers a comprehensive look at how we are rewriting the biological code.

Make Space for Animals

Jun 22, 202654 minSummary

In this episode of Big Picture Science, hosts Seth Shostak and Molly Bentley explore humanity’s complex and often fraught relationship with the animal kingdom. The discussion begins with zoologist Joe Wimpenny, author of Aesop’s Animals: The Science Behind the Fables. Wimpenny examines how ancient fables have shaped our perception of animal behavior for millennia, often through anthropomorphism. While some stories, such as the crow using stones to raise water levels, show surprising scientific accuracy, others like the wolf in sheep’s clothing mischaracterize animal intelligence and perpetuate harmful biases. The hosts reflect on whether these age-old narratives influence how we treat animals today, especially in the context of biodiversity loss. The episode further shifts to a bittersweet look at the history of animals in space. Graphic editors Taylor Magakimo and Alexander Stegmeier discuss their work documenting the various species—from dogs and primates to microscopic tardigrades—that served as involuntary pioneers during the space race. The conversation highlights the ethical complexities of these missions, the individual identities of the animals involved, and the scientific insights gained that paved the way for human space exploration.