Only a few students passed the exam, so you can see that the paper must have been extremely stiff.

You turn it on by either selecting that option from the Safety button at the upper right, or from the Tools menu in the Menu Bar if you have chosen to make that bar visible.

But this our containment of the visible universe. We know the universe is bigger than that which we can see.

This situation brings back, in a highly visible and universally relevant way, some of the problems I mentioned at the start.

It is clear that helping other people means helping yourself.