Why Do We Have Leap Years? (And Why 1900 Was Not One)
A year is about 365.2422 days, not 365. How leap years fix the drift, why century years are usually skipped, and how this affects…
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Weird and wonderful science explained.
Why Is the Sky Blue (and Sunsets Red)? Explained in Two Minutes
Why Is the Sky Blue (and Sunsets Red)? Explained in Two Minutes
The sky is blue because air scatters short (blue) wavelengths of sunlight much more than long (red) ones — Rayleigh scattering. Why it is…
Read article →Why 0.1 + 0.2 Is Not Exactly 0.3 (and Why Excel Sometimes Agrees)
Why 0.1 + 0.2 Is Not Exactly 0.3 (and Why Excel Sometimes Agrees)
Computers store numbers in binary, so 0.1 cannot be stored exactly. Why that makes 0.1+0.2 ≠ 0.3, how it shows up in Excel, Python…
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