A short story in astrotomato's Planetfall series. It's the mid-21st Century, and the Earth is being ravaged with run-away climate change. Ecosystems are collapsing and continents are burning. An experimental spacecraft is leaving Earth on a mission to to the outer edges of the solar system to investigate the presence of a wormhole. It's the only hope humanity has left to - to escape to other worlds. Childhood's End follows the fate of 9 year old Angela Leland, as she waits for her father to return from the mission.