What is machine learning? How does it work? What are these artificially intelligent algorithms useful for? Considering they are used by Amazon, Google, Netflix, Facebook and many other companies we interact with on a daily basis, what are the benefits and drawbacks? Thanks to a listener suggestion, we decided to delve deeper on the subject. Miles O'Brien Productions team members Brian Truglio and Fedor Kossakovski are joined by producer and coder Cameron Hickey to hash it out on this special edition of Miles To Go.

Methane is a much more potent greenhouse gas than Carbon Dioxide. It is more short-lived than CO2 (about a decade as opposed a century), but it is 85 times more effective at warming. Robert Green is a world-renowned expert in spectroscopy, which is a great way to find methane on distant planets, but also ours, as I learned in this interview.

In the final episode in our series on Junk News, some wisdom from one of the leading experts in the murky world of online misinformation. He also happens to be the producer of the series that we aired on the PBS NewsHour. Now he's taking the software he wrote to Harvard, where they hope to find new ways to combat Junk News. I hope you enjoy this talk with Cameron Hickey, my friend and soon-to-be former colleague.

Facebook was created for people to share family photos and memories. But as ads entered the mix, the platform was refined to hold our attention for as long as possible. Quality was not a consideration - until recently. But how to fix the junk news mess without editing it? Maybe Facebook needs a newsroom.

The Internet was supposed to provide a utopian virtual world where all of us could come together in peace, love and harmony to better understand each other and our differing viewpoints…

But we got derailed on the road to utopia, didn't we? Eli Pariser, the man who coined the phrase "filter bubble", knows as much about this as anyone. I hope you enjoy the conversation as much as I did.

As Hawaii trembles with earthquakes and the Kilauea volcano continues to spew forth lava and gas, residents and the wider world watch and wonder: how long will this renewed activity continue? To find out, we turn to Mike Garcia, professor of geology at the University of Hawaii and funded by the National Science Foundation. He has been following the eruption since its beginning, which actually bubbled to life in 1983. To better understand the history and possible future of Kilauea, I sit down with Garcia on this episode of Miles to Go.

Russian actors may have run an online disinformation campaign during the 2016 US presidential elections, but they likely learned their tactics from Americans. As part of our investigation, PBS NewsHour series producer Cameron Hickey tracked down one of these junk news pioneers, Cyrus Massoumi. He runs liberal and conservative junk news sites, which have millions of followers on Facebook. I continue my conversation with Cyrus on this episode of Miles To Go.

Russian actors may have run an online disinformation campaign during the 2016 US presidential elections, but they likely learned their tactics from Americans. As part of our investigation, PBS NewsHour series producer Cameron Hickey tracked down one of these junk news pioneers, Cyrus Massoumi. He runs liberal and conservative junk news sites, which have millions of followers on Facebook. To find out more about the murky world of junk news, I sit down with Massoumi on this episode of Miles To Go.

Top US intelligence agencies agree that Russia meddled in the 2016 US Presidential election using an organized campaign of online trolling and misinformation. The details of exactly how are harder to uncover. Jonathan Albright, data journalist and Research Director at Columbia University's Tow Center for Digital Journalism, studies information flow in networks. Recently, he has been mapping how Russian propaganda spreads on the web. I sit down with Albright on this episode of Miles To Go.

The Cambridge Analytica scandal has placed Mark Zuckerberg and Facebook at the center of the data privacy debate. But is Facebook's ad-driven business model fundamentally incompatible with protecting users' personal data? And, if so, what can be done to fix it? Miles O'Brien Productions team members Brian Truglio and Fedor Kossakovski hash it out on this special edition of Miles To Go.