Im just after pouring myself a cup of tea in a standard mug that I've used many times before. After pouring the tea I sat down at my desk and heard a wierd sort of purring/croaking sounds, a search later made me realise it was coming from my cup of tea and it actually sounded like a little creature was in my cup of a metal ball or something was spinning around in it. What causes this noise? Is it just the cup in the heat of the tea? And why have i never heard this before?
The photo shows a green sweet that has been discovered by ants on a paved path in my garden. The sweet had been dropped several hours before, and had attracted the interest of an ant colony which was carrying it away. But the pattern of the surrounding plant debris is a mystery. What accounts for its arrangement around the candy?