  In review of the White Papers from the Voyage 2050 process and after the
public presentation of a number of these papers in October 2019 in Madrid, we
as White Paper lead authors have identified a coherent science theme that
transcends the divisions around which the Topical Teams are structured. This
note aims to highlight this synergistic science theme and to make the Topical
Teams and the Voyage 2050 Senior Committee aware of the wide importance of
these topics and the broad support that they have across the worldwide science
community.
