[vanderZwan]

> From what I have learned during my studies is that it is easy to kill cell cultures

The linked article mentions:

> only at zero-gravity do cells die via "programmed cell death"

Isn't triggering apoptosis a little different than not being able to keep cells alive?

Of course, this changes nothing about your other points - there are a lot of fishy things going on here

[Tzela]

It is, but you'd need to verify the difference somehow, with fluorescent markers for example. But they appear to have only counted the surviving cells.

[vanderZwan]

... ok so they have an unverified claim of apoptosis too? Yikes, that just makes it worse!