Questions with the keyword 'invent'

• if i invent a time machine in the future and go back in time right now and give it to myself therefore eliminating me by stewieadam to David, Luna, Mark, Melanie, ProbashCategory: General Comments: (No comments so far )
• what is antibiotics and who invented it by jackthorne to ProbashCategory: General Comments: (No comments so far )
• What transportation do you think was the best invention? by dr1ft3r to David, Luna, Mark, Melanie, ProbashCategory: General Comments: (No comments so far )