Why Do Popcorn Kernels Pop?
Not every maize variety turns into popcorn. Popping corn, Zea mays everta, has a hard, nearly airtight pericarp and an endosperm rich in glassy starch...
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Science
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Why Is the Sky Blue While Sunsets Turn Red?
Sunlight looks white, but it is a mix of wavelengths. Passing through the atmosphere, it interacts with nitrogen and oxygen molecules. For particles m...
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207 years since the birth of Léon Foucault, the physicist who made Earth’s rotation visible
18 September 2026 marks 207 years since the birth of French physicist Jean-Bernard-Léon Foucault, known for the experiment that makes Earth’s rotation...
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Why Do Onions Make Us Cry?
A whole onion does not start tears. The blade ruptures cells and mixes substances that had been kept in separate compartments. From that mix comes an...
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49 years since Voyager 1 captured Earth and the Moon in the same frame
On 18 September 1977, two weeks after its 5 September launch, NASA’s Voyager 1 pointed its imaging system back towards Earth. From more than 11 millio...
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18 years since Haumea received its official name and dwarf-planet status
17 September 2026 marks 18 years since the International Astronomical Union assigned the name Haumea to a body beyond Neptune and classified it among...
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343 years since Antonie van Leeuwenhoek’s letter describing microorganisms from dental material
17 September 2026 marks 343 years since a letter from Antonie van Leeuwenhoek to Francis Aston, secretary of the Royal Society in London. In the docum...
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Lab-grown human brain tissue has been integrated into mouse brains
A Stanford Medicine team led by neuroscientist Sergiu Pașca transplanted human cortical organoids into mice genetically engineered so that precursors...
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NASA spacecraft identifies a new lunar crater about 222 metres wide
NASA’s Lunar Reconnaissance Orbiter, which has studied the Moon since 2009, has identified a recently formed impact crater about 222 metres across and...
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67 years since the first powered X-15 flight: the rocket plane that helped open the era of hypersonic flight
17 September 2026 marks 67 years since the first powered flight of the X-15 rocket plane, one of the most important experimental programmes in America...
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50 years since Space Shuttle Enterprise made its public debut on 17 September 1976
17 September 2026 marks exactly 50 years since the public debut of Enterprise, the first vehicle built for NASA’s Space Shuttle programme. The ceremon...
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From mapping exoplanets to swarms in Saturn’s rings: NASA explores concepts for the future of spaceflight
NASA Innovative Advanced Concepts, known as NIAC, is using its annual symposium to present ideas that ask a fundamental question: what might space mis...
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