Interstellar Visitors in the Oort Cloud (science documentary).

In this hour-long science documentary, the Event Horizon bods interview Amir Siraj, director for interstellar object studies at the Galileo Project.

One of his new papers, Breakup of a Long-Period Comet as the Origin of the Dinosaur Extinction, details how a comet is the most likely answer for what caused the dinosaur extinction.

Amir has also released papers on how the Oort cloud is likely full of interstellar objects.

John from Event Horizon discusses this and his take on why UAP and interstellar objects need to be studied.