On a practical note: many old and new mirrors with faux antique glass are actually quite impossible to catch a reflection in, so you’ll need to ask yourself what you need from your mirrors.

If I am an infant and I cry but no one comes to my aid—or worse, someone yells at me or hits me—I am left without a mirror to understand my behavior. Without this reflection, I am unable to ...

But the new findings suggest more species may be able to discern their reflections ... rate of false negatives, according to the new study. Additionally, training animals with mirrors can improve ...

If you put two mirrors facing each other, you can see an endless reflection, like 'the mirror reflected in the other mirror ...' Science news site Live Science asked experts whether it is possible ...