Beyond Supersonic: These Startups Want to Bring You Hypersonic Travel - CNET

They aim to send travelers hurtling across the skies at speeds faster than 4,000 miles per hour.

Supersonic travel? That's so 2021.  While companies like Boom Supersonic and Lockheed Martin are investing in technology that would bring back commercial supersonic travel, a handful of startups are… [+1509 chars]

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