A blob of tar, also known as pitch, has finally dropped for the ninth time in a long-running experiment at the University of Queensland in Australia.
Sadly the scientist who looked over the experiment for 50 years died last year and never saw the pitch drop himself.
Seven drops fell between 1930 and 1988, roughly one every eight years.
But now the drops seem to be slowing down. Just two have been observed since then, one in 2000 and the latest earlier this month, averaging once every 13 years.