Sense About Science is hosting a live Q&A lle mae’n cymryd cwestiynau ar ragdybiaethau a chamsyniadau pobl ynghylch yr hyn y mae ‘naturiol’ yn ei olygu mewn gwirionedd. Are some foods more natural than others? Are the herbal medicines sold in health food shops really ‘all natural’? What would our countryside be like if we had never used artificial pesticides and herbicides? Am fwy o wybodaeth, click on What does ‘natural’ actually mean?