Start with this: What is an underground hyperloop?
As organizations like Hyperloop One propose potential routes for their high-tech, high-speed transportation pipelines, Elon Musk's own The Boring Company (yes, it's really called that) looks to have the go-ahead for an experimental track of its own.
Speaking earlier this week at a conference in D.C., Musk made it clear that expectations for the Hyperloop system are low. That is, a train.
Or perhaps we might even see a direct partnership with Hyperloop One.
"Still a lot of work needed to receive formal approval, but am optimistic that will occur rapidly", Musk tweeted.
But we still have a lot of questions!
A BBC reporter asked Musk why he announced the verbal approval instead of waiting for official approval. A source at the White House said they have had "promising conversations" with Musk to date. Musk did not elaborate on exactly who granted approval to his tunneling venture, The Boring Company. The four-hour drive from the city center of New York City to the heart of D.C. would take just 29 minutes in a hyperloop pod.
It sounds like a pipe dream, but billionaire innovator Elon Musk said it will soon be a reality.
What did they tell him, and when? Is he getting taxpayer funding?
Garcetti said he was considering using Musk's tunnel to support a high-speed rail connection.
If it doesn't, is it worth it?
But some cast doubt on his timeline, pointing out that Musk would have to get approval from dozens of players. Drivers would pull their auto onto a metal platform on the side of the road, and the vehicle would then be lowered into the underground tunnel system.
How about a bar auto?
A representative of the New York Metropolitan Transportation Authority pledged to look into whether the agency had had contact with Musk or The Boring Co. But he didn't go so far as to say who will install the hyperloop.