SCIENCE
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To alien eyes, Earth looks deceptively peaceful
As the world teeters on the brink of nuclear war, distant, advanced civilizations would never know it. Earth appears peaceful…
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Ask Ethan: Do gravitational waves redshift like light does?
As light travels across the Universe, it’s subject to cosmic expansion, changing fields, and relative motion. How about gravitational… Continue…
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The 4 ways science confirms the Moon landings were real
Even though no human has stepped foot on the Moon’s surface in 50 years, the evidence of our presence there…
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Peculiar galaxies showcase the beauty of cosmic violence
Most massive galaxies are spiral or elliptical shaped. But peculiar galaxies showcase the beautiful violence that helps explain our cosmos.…
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Ask Ethan: Does dark energy curve the Universe over time?
Early on, the Universe needed near-perfect flatness, or atoms, stars, and galaxies couldn’t form. What happens once dark energy takes…
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Gravity and quantum physics are fundamentally incompatible
We have two descriptions of the Universe that work perfectly well: General Relativity and quantum physics. Too bad they don’t…
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Ask Ethan: Does nature need to obey laws at all?
No matter what physical system we consider, nature always obeys the same fundamental laws. Must it be this way, and…
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Why “CPT” is the Universe’s most unbreakable symmetry
The combination of charge conjugation, parity, and time-reversal symmetry is known as CPT. And it must never be broken. Ever.…
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Ask Ethan: How dark will the Universe become?
Over billions of years, fewer stars form, galaxies mutually recede, and the Universe becomes ever darker. Here’s how fast it…
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A quirk of relativity is the closest thing to achieving immortality
Nothing lives forever, at least, not in the known Universe. But relativity allows us to get closer than ever: from…
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