This week’s new questions

Are crops grown in greenhouses as nutritious as those grown outside in direct sunlight? And if I shine a flashlight on the front wall of a spaceship travelling at the speed of light, will the light reach the wall?

17 August 2022

Beautiful red ripe tomatoes grown in a greenhouse. Beautiful background — Shutterstock/Roman Zaiets

Are fruits and vegetables grown under glass, plastic or artificial light as nutritious as ones grown outside in direct sunlight?

Georgina Seaman

Newbury, Berkshire, UK

Trip to the moon (lunar) concept - Long exposure night time rocket launch with solar eclipse — Shutterstock / muratart

I am at the rear wall of my spaceship travelling at the speed of light. I switch on my flashlight. Will the light reach the front wall?

Tony Woodward

Portland, Oregon, US

To answer this question – or ask a new one – email lastword@newscientist.com.

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