Astronauts set out on rare all-female spacewalk

Suitcase-sized spacecraft may reveal what happened before first stars formed

Every time you use GPS, you rely on Einstein’s relativity laws — here’s how

New nasal spray shows promise fighting memory loss and brain inflammation

73 landings to a permanent home: Nasa unveils ‘Moon Base User’s Guide’

Four-planet parade: How and when to watch the rare alignment in India

Moon’s oldest craters hiding 3-billion-year-old secret that could fuel future expeditions