The post has 6.7 million views, and social media users across platforms accepted the challenge. Many performed the test solo or in groups, at the office, or as a family or couple. #biologicalage feed ...

Theres sooo much to unpack here, and its all amazing (and for a good cause!). "Lots of amazing young people working beyond 9-5 to save the climate. I joined them & so can you! #earthday #9to5 ...