The SLS for Artemis II is now fully stacked on Mobile Launcher 1, missing only the Orion and its ascent abort motor fairing.

Near-term successes could lead to hypersonic travel around the world, but in the long term, this could be a super-efficient way to traverse the solar system.

Venus has said its ultimate goal is a Mach 4-capable passenger aircraft and cutting down hours-long flights. Think Los ...