The history of astronomy has been a history of receding horizons. The invention of the telescope took us beyond our naked-eye capabilities, to millions (and later billions) of stars within our own Milky Way. The application of photography and multi-wavelength astronomy to telescopes brought us beyond our own galaxy, to the distant “island Universes” populating all the space we can access.
The hole in the Earth's ozone layer is expected to fully heal within 50 years, climate change experts predicts.
SpaceX plans to launch its first paying space tourists on a multi-day trip around the moon