NOVA Presents

If television shows and movies are any indication, we humans spend a lot of our time subconsciously preparing for UFOs carrying maleficent aliens to descend on Earth. But should we rush to create an intergalactic battle plan? In actuality, finding otherworldly life won’t be so easy (or, hopefully, so dangerous). Already, astronomers and other scientists are using a multitude of techniques to search for planets outside our solar system and any signs of life they carry. With 4,500 exoplanets identified out of what could be hundreds of billions in our galaxy alone, one thing is becoming clear: If we find extraterrestrial life, it likely won’t be anything like Hollywood has imagined. Hearing from two exoplanet experts about the diversity of planets and life in the Milky Way, Dr. Alok Patel learns that Earth is incredibly unique—and surprisingly mundane.Learn more about NOVA and subscribe to our YouTube channel. 

When our ancestors looked up into the night sky, they too saw a great, glimmering band of light splitting the darkness. In Southeast Asia, people called it “the Silver River.” In Southern Africa, “the Backbone of the Night.” And in the West, around 2,500 years ago, it earned the name “the Milky Way.” Across the globe, civilizations had theories of what the band of light was and why it was there. But only recently have humans had the tools to get the full picture. Today we know the Milky Way is our galaxy: two spiral arms filled with more than 100 billion stars, all rotating around a supermassive black hole. And here on our little blue planet, we’re in the middle of it all. Dr. Alok Patel speaks with two galaxy experts to find out how scientists have built the first high-resolution, three-dimensional map of the Milky Way—and what that map reveals about the formation and future of our galactic home.Learn more about NOVA and subscribe to our YouTube channel. 

The process that powers our sun was still a mystery about 100 years ago. Bit by bit, scientists have worked out that the fusion of hydrogen at a star’s core can generate enough power to keep it shining for billions of years. Now, armed with this knowledge, researchers around the world are trying to figure out if we can recreate that fusion process here on Earth. (And yes, trying to kickstart fusion—and then contain superheated plasmas that reach temperatures up to 100 million degrees Celsius—is just as hard as it sounds.) If scientists can pull it off, the payoff could be huge: A deep understanding of stellar physics could one day lead to a virtually unlimited supply of clean energy. To discover just how, Dr. Alok Patel hears from an astrophysicist and a fusion scientist.Learn more about NOVA and subscribe to our YouTube channel. 

This is NOVA Now Universe Revealed, hosted by Alok Patel, a physician, science communicator, and somewhat of a space nerd. In this special 5-part series, blast off with us to explore alien worlds, galaxies, stars, black holes, and the start of the universe including, the Big Bang. This podcast has been made possible by the Gordon and Betty Moore Foundation. Learn more about NOVA and subscribe to our YouTube channel. 

You may think of insects as creepy-crawly pests. But for at least 2 billion people on the planet, they’re a source of nourishment. Entomophagy, the practice of eating insects, has been around for thousands of years. But it isn’t a global practice today; cuisine in Europe and the U.S. tends to exclude insects. Could that change? The culinary case for insects is a compelling one—but it’s not the only one. A 2013 UN food and agriculture report proposed insect consumption as a possible solution to global food insecurity and a mitigator of climate change. Lately, efforts by scientists and entrepreneurs have pushed this agenda forward. To learn more about edible insects and what it might take for insects to take a more prominent place on people’s plates, Dr. Alok Patel speaks with two entomologists and tours a Bay-Area based company specializing in protein-packed insect-based treats. Learn more about NOVA and subscribe to our YouTube channel. 

The internet revolutionized how we communicate and exchange information. Now, it’s causing the ways in which we invest and spend money to change, laying the foundation for cryptocurrency. How this digital currency functions—much like the inner workings of the internet itself—is invisible to most. But the ongoing explosion of interest and investment in cryptocurrency is undeniable. In September, El Salvador became the first country to accept Bitcoin as legal tender. Meanwhile, China announced a ban on all crypto trading and mining. So what exactly is cryptocurrency, and how risky is it to invest in it? Is the future of money heading in a digital direction? With help from innovators paving the way for the future of money in a digital world, Dr. Alok Patel learns what the hype is all about.Learn more about NOVA and subscribe to our YouTube channel. 

The cannabis industry has flowered into a billion-dollar industry in the last decade. Now, cannabis is easier than ever to legally access for medical or recreational use in the majority of U.S. states. But does legalization mean that cannabis is actually safe to use? After all, cannabis is still federally classified as a Schedule 1 controlled substance, defined by the Drug Enforcement Administration as a substance with “no currently accepted medical use and a high potential for abuse.” (Though the Senate’s Cannabis Administration and Opportunity Act proposes to end cannabis’s federal prohibition.) But even under current restrictions, some researchers have interrogated assumptions about the addictive potential of cannabinoids, the chemical compounds of the cannabis plant, and investigated their therapeutic properties. With the help of leading cannabis researchers, host Dr. Alok Patel explores current studies to find out what science can tell us about the therapeutic potential, risks, and long-term effects of cannabis on your body and brain.Learn more about NOVA and subscribe to our YouTube channel. 

The 2021 Atlantic hurricane season is half-way through and, like 2020, is expected to be another above-normal Atlantic hurricane season as estimated by NOAA’s Climate Prediction Center. As of September 14, 2021, there have been over a dozen named storms, including three major hurricanes, Grace, Ida, and Larry, that reached Category 3 status or higher. Climate computer models predict that rising ocean temperatures—warm water being fuel for hurricanes—impact storm activity; but does this mean that as our planet warms, hurricanes are actually becoming stronger and more destructive? Dr. Alok Patel speaks with climate scientists and a hurricane researcher to get inside the anatomy of tropical storms, and to better understand what the evidence shows, and what we can expect for the future.Learn more about NOVA and subscribe to our YouTube channel. 

Back-to-school jitters are in the air as many schools across the U.S. welcome students back to in-person learning for the 2021 to 2022 school year. But, after more than a year of pandemic-related disruption and the more recent emergence of the highly infectious delta variant, excitement to get back into the classroom is met by significant concern for student health. Dr. Alok Patel speaks with a leading expert in aerosol transmission of infectious disease, an education researcher and specialist in individualized instructional interventions for students, and a developmental psychobiologist studying stress in young people. They share insights into strategies to reduce viral spread in schools and mitigate the pandemic’s effect on students’ learning, mental health, and overall well being. To learn more about the science behind kids and parenting, check out the YouTube channel “Parentalogic” hosted by Dr. Patel and comedian and mom Bethany Van Delft.Learn more about NOVA and subscribe to our YouTube channel. 

Gasoline-powered passenger cars account for about 17% of global carbon dioxide emissions. Earlier this month, President Biden signed an executive order setting a goal that by 2030, half of all cars sold in the U.S. would be hybrid or electric. And major automakers have joined in support to make this a reality. But will a widespread switch to battery-powered cars ensure a cleaner future? And what does it take to make the shift from gas to electric? Dr. Alok Patel speaks with a leader in automobile battery development to learn the inner workings of electric vehicles, and checks in with an expert in energy and transportation systems to better understand the environmental impact and infrastructure requirements of a shift to electric.Learn more about NOVA and subscribe to our YouTube channel.