If you didn’t sleep well last night, you can still feel awake if you just convince yourself you aren’t tired. ‘Placebo sleep’ not only improves cognitive function, it makes you perform better than when you spend the day thinking about being tired.  (, , )

It is illegal to own only one guinea pig or parrot in Switzerland.  Because both species are highly social, keeping them isolated denies them regular interaction and is considered animal cruelty.  (, )