Podcast:99% Invisible Published On: Tue Oct 25 2016 Description: In the summer of 1961 the upper stage of the rocket carrying the Transit 4A satellite blew up about two hours after launch. It was the first known human-made object to unintentionally explode in space, and it created hundreds of … Continue reading → Subscribe to SiriusXM Podcasts+ on Apple Podcasts to listen to ad-free new episodes and get exclusive access to bonus content.