Portside

Parameter Ghosts is an animation of otherworldly beauty. Technically, it's a random walk through the four-dimensional parameter space of strange attractors. 

#AhmedKathrada (Uncle Kathy) , who died this week, was a giant of the South African liberation movement. His voice lost none of its edge or clarity until the end.

First Daughter Ivanka Trump gets a White House job, recently impeached South Korean President Park Geun-hye is arrested, and Donald Trump fights with his fellow Republicans.

Bob Dylan will accept the Nobel Prize in Literature at a private meeting Stockholm and will send a taped acceptance lecture.

Plus, Seth takes a closer look at Trump and the GOP's plan to allow Internet companies to sell people's Internet data.