Engineering

Startup using microorganisms to make 'green' cement

A Colorado company is channeling the industriousness of microorganisms to grow zero-carbon cement in a process that is similar to the way corals build reefs or oysters produce shells.

Business

Twitter, analysts wary of Musk takeover bid

As tempting as access to Elon Musk's wealth may be, Twitter is not eager to be ruled by a billionaire known for shooting from the hip with little regard for the consequences.

Business

Elon Musk's move to buy Twitter faces roadblocks

Even for the richest person on the planet, buying Twitter was always going to be a challenge—a highly complex financial transaction now made even trickier by a defensive "poison pill" move from the platform's board.