New York expands street sensors to map crossings, near-misses and traffic patterns.

A look at the quest to mine the bottom of the ocean for valuable minerals, the connection between light pollution and allergies and more climate news.

© The New York Times

Manhattan's rectangular grid creates a beautiful spectacle four times a year.

People filled the streets of New York on Thursday to get a glimpse of this year’s first Manhattanhenge. The spectacular view of the sun setting, flanked by the city’s streetscapes, will also occur on Friday and July 11 and 12.