A bright pink, yellow, or orange fluid under your vehicle cool indicates that you have an engine coolant leak, which should be addressed immediately.

Source: https://kpel965.com/ixp/29/p/identify-leaks-from-your-vehicle/

But their stay was doubled after their Soyuz capsule developed a coolant leak while parked at the space station.

Source: https://www.gjsentinel.com/news/us/nasa-astronaut-frank-rubio-breaks-us-record-for-longest-spaceflight/article_5d41242b-9967-52dd-ae90-1b81f64fb036.html

Engine coolant is a mix of water and antifreeze that cools your engine and stops it from overheating.

Source: https://www.impartialreporter.com/news/23345195.aa-issues-tips-avoid-breakdowns-met-office-predicts-snow/?ref=rss

Minor leaks will eventually lead to significant losses over time, so it's critical to find coolant leaks before overheating takes its toll.

Source: https://www.slashgear.com/1413957/reasons-your-car-is-losing-coolant/

Over time, dust and debris can accumulate in the radiators, blocking the flow of coolant.

Source: https://www.devicemag.com/kraken-m22-not-cooling/

Russian space agency Roscosmos said that coolant leaked from an external backup radiator for Russia's new science lab.

Source: https://phys.org/news/2023-10-russia-coolant-leak-backup-line.html

The coolant is then pumped to a radiator where it is cooled down by fans before being circulated back to the CPU.

Source: https://www.devicemag.com/can-you-remove-a-cpu-cooler/

The MsNB uses natural circulation, moving the molten salt nuclear fuel through the reactor without the need for pumps, valves, or coolant loops, enhancing safety, reliability, and reducing cost.

Source: https://energycentral.com/c/ec/x-energy-dow-select-texas-site-smr-power-plant

The Soyuz spacecraft it’s meant to replace, MS-22, sprung a coolant leak in mid-December, rendering it unsafe for a crewed journey back home.

Source: https://gizmodo.com/spacecraft-leak-postpones-russian-iss-lifeboat-mission-1850112444

WASHINGTON — A radiator on the Russian segment of the International Space Station started leaking coolant Oct. 9, the third such incident involving Russian hardware at the station in less than a year.

Source: https://spacenews.com/russian-iss-module-experiences-coolant-leak/