Dogs have a long history alongside humans, giving them an amazing ability to read human cues. Dogs also possess an incredible sense of smell, which enables them to detect diseases, such as COVID and lung cancer, in humans from odour alone. Whether dogs’ capabilities extend to detecting odours associated with psychological states has been explored far less.
Even the most devoted cat owners wonder at some point, perhaps waking up in a cold sweat in the middle of the night, whether their cat really loves them. Dog people like to smugly point out dogs’ long history as humankind’s best friend.
But research shows cats’ reputation as a cold and aloof pet is undeserved.
Frogs once lived alongside dinosaurs. About 45 million years ago, the North Sea covered half of Germany. It’s incredible to think these little creatures survived the dinosaurs’ extinction. But a lower level mass death did take place in what is now called the Geiseltal region in central Germany and the cause has long remained a mystery.