US weather balloons are fairly small, with a diameter of about 5 feet at launch. But they expand as the air around them gets thinner. At high altitude, they’re up to 25 feet across.

The U.S. isn’t the only country that launches weather balloons for atmospheric data collection. There are around 900 sites across the globe that launch weather balloons at the same time each day ...

The US intelligence community has developed a method to track China’s fleet of surveillance balloons that was only discovered within the last year, six people familiar with the matter tell CNN.

Kathmandu (Nepal), Dec 18 (ANI): Nepal will host its first-ever International Balloon Festival next week in Nepal’s Pokhara. Addressing a press conference, the organisers of Balloon Nepal Pvt ...

Departure of Jacques Charles and Marie-Noel Robert’s ‘aerostatic globe’ balloon from the Jardin des Tuileries, Paris, on Dec. 1, 1783, ...

The annual Macy’s Thanksgiving Day Parade will soon bring together an unrivaled cast of balloon characters, along with floats, musical acts and people of all ages — from around the globe ...

“If so, the balloons will circle the globe many times—so that an individual U.S. balloon could be over the U.S. So if they shoot it down, they have to cover up the fact that it is a U.S. spy ...

The Pentagon says the balloons are part of a Chinese surveillance program that has gone on for years and spanned the globe. The balloon that was recovered allegedly contained sensitive equipment ...