Do you know how many days does it take to empty 3.7 million litres of water? The clip, which is absolutely mesmerising and intriguing, shows the draining of 3.7 million litres of water from a tank in the facility. “Do you know how many days does it take to empty 3.7 million litres of water,” asked ESA in the post’s caption. “Once the refurbishment is complete, 3.7 million litres of water will be pumped back in over three weeks and reheated to 28°C for long underwater dives and training sessions. Others wanted ESA to share a video of the tank being filled again.

Source: Hindustan Times November 19, 2020 04:16 UTC