New York hits pollution record with hundreds of flights delayed amid Canada wildfire haze.

Heat-health warning for parts of England as UK prepares for hottest day of 2023, and a deadly ‘irreversible’ heart condition is in fact reversed in a major breakthrough.  

Also in this episode:

• TikTok owner ByteDance accused of helping China spy on Hong Kong protesters
• WhatsApp adding Twitter-like ability with new 'channels' feature
• Crackdown on firms marketing cryptoassets to be introduced by City regulator
• Newly-discovered dinosaur may have been a last gasp for its species
• Scientists demonstrate wireless power transmission from space to Earth for first time
• ‘Virgin’ crocodile found to have made herself pregnant

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