DERO May Monthly update: https://forum.dero.io/t/dero-monthly-update/446/3

DERO-DAG(Directed Acyclic Graph): DERO Atlantis will be DERO-DAG based. DERO-DAG is mineable, POW based, fully linear with same level of security as blockchain.
No orphans, scalability limits defined by resources(Compute, Network, Storage etc.)