  At the end of October 2022, Elon Musk concluded his acquisition of Twitter.
In the weeks and months before that, several questions were publicly discussed
that were not only of interest to the platform's future buyers, but also of
high relevance to the Computational Social Science research community. For
example, how many active users does the platform have? What percentage of
accounts on the site are bots? And, what are the dominating topics and
sub-topical spheres on the platform? In a globally coordinated effort of 80
scholars to shed light on these questions, and to offer a dataset that will
equip other researchers to do the same, we have collected all 375 million
tweets published within a 24-hour time period starting on September 21, 2022.
To the best of our knowledge, this is the first complete 24-hour Twitter
dataset that is available for the research community. With it, the present work
aims to accomplish two goals. First, we seek to answer the aforementioned
questions and provide descriptive metrics about Twitter that can serve as
references for other researchers. Second, we create a baseline dataset for
future research that can be used to study the potential impact of the
platform's ownership change.
