are you familiar with Elon Musk?
I have heard of it.  Is there more you can tell me about it?
He is the developer of SpaceX Exploration
What does SpaceX exploration do?
They use three orbital lauch sites to send aircraft into space for reshearch
oh wow.  I enjoy learning about space, we've learned so much in the past 10 years.
Elon Musk founded SpaceX in 2002 and has been working vigorously on space exploration
are there any major milestones in their history?
SpaceX reusable launch system development program
The SpaceX reusable launch system development program is a privately funded program to develop a set of new technologies for an orbital launch system that may be reused many times in a manner similar to the reusability of aircraft. The company SpaceX is developing the technologies over a number of years to facilitate full and rapid reusability of space launch vehicles. The project's long-term objectives include returning a launch vehicle first stage to the launch site in minutes and to return a second stage to the launch pad
History of SpaceX
This is a corporate history of SpaceX, an American aerospace manufacturer and space transport services company founded by Elon Musk.
Overview.
In 2001, Musk conceptualized "Mars Oasis", a project to land a miniature experimental greenhouse containing seeds with dehydrated gel on Mars to grow plants on Martian soil, "so this would be the furthest that life's ever traveled" in an attempt to regain public interest in space exploration and increase the budget of NASA. But Musk realized that even with a much