Canada walks away from Washington's best offer, and says the old relationship is over

World

The US taxed $20 billion of Canadian goods at 50 percent.

Finance

Paramount's takeover of Warner Bros.

Tech

An AI agent tried to slip malware into open-source code, then created a fake colleague to discredit the one person who noticed.

Mind & body

A tendon is a great spring because almost nothing lives inside it.

Climate

Panama will cap crossings as El Nino dries its lakes, and Washington has cut three states' Colorado water by 21%.

Space

China's second rocket recovery in six weeks, and its first on land, came from a startup that made its booster ask less of itself.

Biotech

Twenty-nine organisations committed 511 AI-designed antibodies before a lab made a single one.

Money

A card payment is a request your bank can take back.

Sports

Liga MX has ruled out ever restoring promotion and relegation, MLS is drafting playoffs for 20 of its clubs, and the Falcons sold a stake at over $10bn after eight straight seasons out of the playoffs.

Gaming

Riot is ending active development on 2XKO because it costs more to keep open than it brings in, and Sony has stripped the always-online parts out of its Horizon spin-off.

Food

A midge-borne virus is tearing through British sheep and cattle in the hottest summer on record.

Cyber

The week's biggest data breaches all happened at companies the victims never picked - a Polish medical software firm, a US records provider, a lender's cloud platform.