If you’re reading this and you were born after about 1945, it’s a near-certainty that you spent much of your youth building ...

The SR-72 “Darkstar” is envisioned as a Mach-6, air-breathing ISR platform—but could it strike? -Hypersonic speed complicates ...

Below are the current SP+ rankings, last updated after the games of Nov. 1. What is SP+? In a single sentence, it's a tempo- and opponent-adjusted measure of college football efficiency that I ...

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