April Issue: The Dark Sector 🔭

See dark matter, dinosaurs, and more in a new light! ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏  ͏ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­

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New Issue: April 2025 Read the Issue Dear Friend of Scientific American, Our April issue is packed with stories that I hope will intrigue, enlighten and delight you. In our cover story, theoretical physicist Kathryn Zurek describes a provocative idea to explain dark matter, the invisible stuff that both makes up 80 percent of the material universe. Rather than a single particle, dark matter could be a hidden sector full of dark particles and forces that combine and interact.   If you're interested in another cosmic adventure, dive into senior news reporter Meghan Bartels' look at the journeys of the beloved Voyagers' spacecraft.    Two features focus on more personal journeys. In one, journalist Paul Marino describes a decades-long search for a diagnosis to explain bursts of involuntary movements he experiences. Along the way, he finds self-acceptance and openness about being neurodivergent. Journalist Diana Kwon talks to individuals with schizophrenia and researchers who are finding the mental health disorder is more complex than once thought. Plus, she reports on a promising new drug, the first antipsychotic to target a neurotransmitter other than dopamine.     The Army Corps of Engineers, long known for building dams, levees, sea walls and bulkheads to control nature, is taking a different tact. Find out how the Corps is leaning into nature-based solutions with great success.   This month's line-up also includes a whimsical look at the fierce armored dinosaurs of the Mesozoic and what gave their bulky spikes, blades, plates and horns so much power.    Take advantage of 90 days of digital access to enjoy the entire issue. Plus, get access to a subscriber-only online event to hear from Kathryn Zurek directly!   Scientifically yours, Jeanna Bryner Acting Editor in Chief

Issue Highlights Dark Matter Might Lurk in Its Own Shadow World Dark matter could be an entire dark sector of the universe, with its own particles and forces. Read More NASA's Beloved Voyager Probes Find Puzzles beyond the Solar System For two decades now, the iconic twin Voyager spacecraft have been quietly overturning everything we thought we knew about the boundary between our solar system and interstellar space. Read More After Hiding My Undiagnosed Neurological Condition for Decades, I Finally Found Answers A personal quest and progress in brain science finally put a name on baffling behaviors. Read More The Nation's Chief Engineers Turn to Nature to Improve Flood Protection The U.S. Army Corps of Engineers has uncharacteristically been working with nature instead of bulldozing it into submission. Will this enlightened approach prevail? Read More Read the Issue 90 Days of SciAm for Just $1!

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