During Donald Trump’s second presidency, ProPublica will focus on the areas most in need of scrutiny. Here are some of the issues our reporters will be watching — and how to get in touch with them ...

Researchers have developed an ultra-compact passive true time delay device that could help reduce the size, complexity, power requirements and cost of phased array designs. The device uses the ...

In a first-of-its-kind occurrence, about 15 red octopuses in the La Jolla aquarium's care have transitioned from a free-swimming, planktonic stage to seafloor settlement stage ...