Do tortoises catch yawns?
No evidence of contagious yawning in the red-footed tortoise Geochelone carbonaria
Scientists trained a tortoise to yawn, then checked whether other tortoises would catch the yawn. They did not.
Ig Nobel 2011
Contagious yawning may be linked to empathy. To test whether it’s just a reflex, the team trained one tortoise to yawn on cue and showed it to other tortoises.
No one yawned back. The tortoises were unbothered, which is very on-brand.
The most chilled-out null result in science.