We tend to think of the seafloor a few kilometres down as a flat plain. In fact, about two-thirds of this “abyssal” seabed is made up of gentle rolling hills a few hundred metres high, says Jennifer Durden at the University of Southampton, UK.

On a phonemic level, phenomena of synesthesia have often been described and studied. Practically all children and a good many adults—though for the most part adults will deny it—spontaneously associate sounds, whether phonemes or the timbre of musical instruments, with colors and forms.

And we mus[t]n't forget Three of Hearts, a feature-length documentary about the nine- year trinogamous relationship among bisexual men Sam Cagnina and Steven Margolis and heterosexual woman Samantha Singh.

Ow, he is just a wood harum-scarum creature, that wad never take to his studies;—daft, sir, clean daft. / […] / [W]owff—a wee bit by the East-Nook or sae; it's a common case—the ae half of the warld thinks t'other daft. I have met with folks in my day, that thought I was daft mysell;[…] / I cannot make out a word of his cursed brogue, said the Cumbrian justice; can you, neighbour—eh? What can he mean by deft? / He means mad, said the party appealed to, thrown off his guard by impatience of this protracted discussion.