The short-lived tammar wallaby placenta expresses genes resembling eutherian placentas, establishing marsupials as "placental mammals", further, dynamic lactation allows marsupials to compensate for short placentation by expressing key placental genes in the mammary gland.

The incus of the middle ear plays a role in supporting the lower jaw prior to the formation of the mammalian jaw joint allowing early feeding in monotremes and marsupials.

In-silico modeling of gene and protein emergence reveals how colony-stimulating factors contributed to the evolution and functional adaptions observed in mammalian neutrophils.

Many developmental functions in marsupials and eutherian mammals are accomplished by different tissues, but similar genes.

There is no relationship between the demographic susceptibility to extinction and the estimated extinction chronology among Sahul’s megafauna, suggesting that human choices, a species’ ecological requirements, and/or random climate variation instead determined the extinction chronology.

The transcription factor HAND2 evolved uterine expression during the origins of pregnancy and may be important for maternal-fetal immune signaling and parturition.

Mammals evolved an invasive placenta early in the origins of pregnancy.

The diversification of hand bones in mammals was much more dynamic than those of the proximal and intermediate forearm, involving higher morphological diversity, stronger integration, and greater evolutionary lability at distal structures.

Chicken ANP32A, and not chicken ANP32B, supports influenza polymerase activity and thus editing of this single gene may generate chickens that are resilient to influenza virus infection.