''Dragonfly'' (spacecraft) NASA awards $1 billion to the "Dragonfly" mission, which will use a dual-quadcopter drone to explore Titan for signs of life.
List of fast radio bursts Scientists announce, through the "Science" journal, that they discover the source of a fast radio burst for the first time. FRB 180924, a non-repeating FRB which was detected in September 2018 using the Australian Square Kilometre Array Pathfinder, originates from a large galaxy known as DES J214425.25−405400.81 located 3.6 billion light-years from Earth.
2020 presidential election The second of two Democratic Party debates for the nomination of the party's nominee in the 2020 United States presidential election is held in Miami, Florida.
Argentina–Cuba relations Argentina Education Minister Alejandro Finocchiaro strongly condemns a school in Chaco Province for displaying a Cuban flag on Argentina's Flag Day, asking, "What differences are there between the Cuban regime and the Nazis?" He also describes Che Guevara as a "criminal and genocider".
Angara Airlines Flight 200 Angara Airlines Flight 200 crashes on landing at Nizhneangarsk Airport, Far East Russia, killing two of the 47 people on board.
Yemeni civil war Arab Coalition spokesman Turki al-Maliki says that his forces intercept and down a drone in Yemeni airspace after its launch toward Saudi Arabia by Houthis north of Sanaʽa.
A pair of suicide bombings Twin blasts from suicide bombers, kill one police officer and wound nine others in Tunis.