Since the web isn't a permanent repository, either reference something that is, or give the date on which you access the web article as part of the reference. And in your example, give the URL at which you found the article, not just the title of the website.

The Internet Archive and its Wayback Machine is permanent, but the date will be required for resources that change.

Since the web isn't a permanent repository, either reference something that is, or give the date on which you access the web article as part of the reference. And in your example, give the URL at which you found the article, not just the title of the website. So, more like this:

Hutchinson, L, 2016. 'The audacious rescue plan that might have saved space shuttle Columbia, USA, ARS Technicia: https://arstechnica.com/science/2016/02/the-audacious-rescue-plan-that-might-have-saved-space-shuttle-columbia/, accessed April 1, 2020.

The Internet Archive and its Wayback Machine is permanent, but the date will be required for resources that change.