minus-squareswitchboard_pete@fedia.iotoAtheist Memes@lemmy.world•Eat leadlinkfedilinkarrow-up1·8 months ago Decay of radon-222 isn’t the only way lead can be created, just a way The U238 that started the chain could pre-date the earth Half life is only when half of the sample has decayed, but less than half could have decayed into lead linkfedilink