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How Long Does Covid-19 Immunity Last?
A person who has been vaccinated against COVID-19 will have a slightly different immune response to the coronavirus than someone who was previously infected, researchers say. How long does immunity last—and is it all about antibodies?
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Can bringing predators—and fear—back into an ecosystem help restore its natural balance?
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Follow the epic journey of dog domestication and see what science says about dogs’ love.
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Paleontologist Kirk Johnson explores the dynamic history—and future—of ice at the poles.
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Discover the science behind Leonardo da Vinci's masterpieces—and Mona Lisa's iconic smile.
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53:25
Can new engineering techniques help prevent deadly bridge collapses?
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Amazing fossils reveal how mammals took over after an asteroid wiped out the dinosaurs.
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53:32
Discover why scientists and entrepreneurs alike have their sights set on the Moon again.
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In the shadow of Vesuvius and Pompeii, a lesser-known volcano puts Naples at risk.
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53:34
New technologies are promising a new renaissance in space travel.
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New archeological evidence shows the stunning engineering of the Great Pyramid of Giza.
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Journey to Kīlauea volcano to investigate the eruptions that shook Hawaiʻi in 2018.