In the race to develop fusion energy, each unique approach requires its own specialized techniques to determine net energy gain, an equation balancing energy in and out that’s known by the letter Q. A ...

The NFL announced Wednesday that it will utilize Sony's Hawk-Eye technology in some preseason games this summer to test its viability in terms of measuring the line to gain for first downs. According ...

The NFL is planning to modernize the first down measurement system in 2025, league football operations representatives said on Wednesday. Beginning in the 2025 season, the NFL will use Hawk-Eye ...

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. The NFL is moving closer to replacing the ...

FILE - Chain gang first down marker during an NFL preseason football game between the New Orleans Saints and the Kansas City Chiefs at the Mercedes-Benz Superdome in New Orleans, Friday, Aug. 9, 2013.