Table 1. Summary of scRNA-seq datasets used in this study.

Organism	Tissue	Number of cells	# of velocity genes
Mouse	Pancreatic endocrinogenesis	3,696	1,027
Mouse	Dentate gyrus	18,213	1,304
Mouse	Gastrulation	89,267	592
Mouse	Neocortex	32,061	2,444
Human	Forebrain	1,720	826