What scientific concept does Neil deGrasse Tyson address regarding black holes?

Neil deGrasse Tyson addresses the notion that the speed required to escape the gravitational pull of a black hole exceeds the speed of light. This concept is rooted in the laws of physics, particularly those outlined in Einstein's theory of relativity, which establishes that nothing can travel faster than the speed of light in a vacuum. In the context of black holes, this means that once an object crosses the event horizon—the boundary surrounding a black hole—it cannot escape the immense gravitational forces at play. The concept emphasizes the fundamental limitation imposed by the speed of light and reinforces the idea that black holes represent the ultimate limit of gravitational attraction where escape becomes impossible, highlighting their mysterious and intriguing nature in astrophysics.