Peter Thiel's big bet on solar-powered cow collars (techcrunch.com)

Founders Fund led Halter’s $220 million Series E, backing a New Zealand startup that uses solar-powered collars, low-frequency towers, and an app to create “virtual fencing” for cattle. The system trains cows to respond to audio and vibration cues so farmers can monitor and move herds remotely while also tracking health, fertility, and other behavior. Halter says it has helped farms boost land productivity by up to 20% and now has collars on over a million cattle, with further expansion and additional products still in development.