In less than 100 seconds, Roberto Trotta explains how astrophysicists calculate geometries in the universe Watch more from our 100 Second Science video series. Want to read more? Registration is free, quick and easy Note: The verification e-mail to complete your account registration should arrive immediately. However, in some cases it takes longer. Don't forget to check your spam folder. If you haven't received the e-mail in 24 hours, please contact customerservices@ioppublishing.org. E-mail Address
