The first batches could reach passenger flights this month.

Amsterdam’s Schiphol Airport is testing an electric aircraft tug that can both move the plane around the tarmac and power its auxiliary systems – and that second bit could slash ground-level airport emissions by more than 80%, saving gobs of money on fuel in the process.

GPS is commonly treated as a way to find a route or track a delivery. In critical infrastructure, its quieter function is often more consequential: it distributes precise time that helps far-flung systems agree on when something happened. That shared time base supports cellular and broadband networks, parts of the electric grid, and regulated timekeeping […]

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