Watch the whole thing or start at 5:51. From there, 6:55 gives a letter mnemonic that isn’t very helpful, but 7:26 gives a phrase that may be!

Interesting article (https://www.sciencealert.com/hidden-network-of-secret-tunnels-found-in-bones-is-totally-crazy-scientists-say?fbclid=IwAR3nihfecfinLauhE8IVZvvw2Z0BltmtG-W73EZNAuQSb6eQ63rozTnaMzs) and video about trans-cortical vessels recently discovered in bone tissue. Pretty cool stuff!