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The Internet was briefly sent into a panic yesterday, after a NASA audio feed from the International SpacStation (ISS) was accidentally "misrouted" to a public feed.The ISS broadcasts its view live, including footage from cameras inside and outside the station. At time of writing, you can even watch astronauts conducting a live space walk.While very cool, mishaps with the feed can happen, as evidenced on Wednesday when the public heard audio that sounded particularly concerning. In the audio, which was assumed to be ground control communicating with the ISS, you can hear a doctor advising on a medical emergency with one of the crew who was suffering from decompression sickness.“So if we could get the commander back in his suit, get it sealed [...] for suited hyperbaric treatment, section three for oxygen post splashdown, that would be my recommendation," the unknown voice offering medical advice said in the feed. "Understand that this is a best effort treatment and so whatever you can do is going to be better than nothing.""I would like you to have 100 percent O2 flowing via mask while you get the suit on prior to closing the visor and pressurizing I'd like you to do a pulse check one more time," the voice added.        IFLScience is not responsible for content shared from external sites.While concerning to people listening in, NASA confirmed shortly after that the audio was in fact a training exercise conducted on the ground. "There is no emergency situation going on aboard the International Space Station," NASA explained in a statement posted to X (Twitter). "At approximately 5:28 p.m. CDT, audio was aired on the NASA livestream from a simulation audio channel on the ground indicating a crew member was experiencing effects related to decompression sickness (DCS). This audio was inadvertently misrouted from an ongoing simulation where crew members and ground teams train for various scenarios in space and is not related to a real emergency. The International Space Station crew members were in their sleep period at the time. All remain healthy and safe, and tomorrow’s spacewalk will start at 8 a.m. EDT as planned."As oopsies go, it's a pretty big one. But fear not, all is well on the ISS, and it's reassuring to know that NASA has plans in action should any actual health emergencies take place.

NASA astronauts Tracy C. Dyson and Matthew Dominick are currently getting ready to exit the International Space Station (ISS). No, they are not coming back to Earth, they will be taking the airlock to perform an extravehicular activity (EVA), better known as a spacewalk, around the station, which is being streamed live today. Part of it will be maintenance of the station, but there is also some exciting science too, including scooping up some microbes to study.Dyson and Dominick will be removing a radio frequency group hardware from a pallet that is on the outside of the Destiny Laboratory Module. They will be helped in this job by the Canadarm2 – the robotic arm of the station – piloted by NASA Flight Engineers Mike Barratt and Jeanette Epps, who practiced the manouver on the computer already. The spacewalk is due to last around 6.5 hours, and following the scheduled maintenance, the astronauts will be swabbing the surfaces of the Destiny module and also the Quest module as part of a research project called ISS External Microorganisms.        There are life support system vents on those modules and both bacteria and fungi might have found our way out of the ISS. The question is can they survive there? The samples will be brought down to Earth for detailed analysis. Bacteria on the ISS has already been seen to have mutated into something very different from its earthly counterparts so scientists are curious about their ability to adapt to the harsh environment of space.This is the first of three EVAs scheduled for this summer. Although relatively common, spacewalks are dangerous, with one in five having serious incidents and close calls. Luckily the "emergency" on the ISS yesterday, accidentally broadcast across all its live channels, was actually a medical training simulation, even if it did cause a brief panic.The broadcast begins 6:30 a.m. ET (12pm UTC) and it can be followed in the video above, or on NASA+, NASA Television, the NASA app, YouTube, and the agency’s website.