Jim Barber/Shutterstock
Does life require Earth’s rate of rotation to lie in a certain range? What are those limits and what changes to life’s existence would there be as those limits were approached?
John Grant,
Shelly Beach, Queensland, Australia
Malerapaso/Getty Images
When a bubble, or spirit, level is level, what does that mean relative to Earth?
John Snape,
Barnham Broom, Norfolk, UK
To answer this question – or ask a new one – email lastword@newscientist.com.
Questions should be scientific enquiries about everyday phenomena, and both questions and answers should be concise. We reserve the right to edit items for clarity and style. Please include…
