Questions with the keyword 'invention'

• Have you made any new inventions or discoveries by needforspeed to Lewis, Jess, Ian, Divya, Clare Comments: (No comments so far )
• I don’t know who to ask this but I’m interested to find out… How does echo location work- or is that not a science by popcorn32 to Clare, Divya, Ian, Jess, Lewis Comments: (So far, one comment )
• Have you made any designs that is being used now? by 02salvadord to Jess Comments: (No comments so far )