Dolbadarn Castle in Wales was built in the 12th century and remains standing. Above it, the Milky Way looms just as it did centuries ago.
NextSense's EEG-equipped wireless earbuds are an intriguing idea, but I'm not sure if sleep-tracking can save me from constant tiredness.
Though they orbit the same planet, Uranus' outer rings have two very different origin stories.
Where do massive planets end and stars begin? It may come down to how they formed.
The pristine star formed outside the Milky Way and later drifted into our galaxy.
The collision likely resembles the one that formed the Moon around 4.5 billion years ago.
Without the mass stellar migration, life may not have been able to form on Earth.
A photograph of Dolbadarn Castle in Wales. Photo: Robert Price 
