She formulated the "radiator theory" that cranial blood vessels were important for hominin brain evolution, and the "putting the baby down" hypothesis that prehistoric mothers and infants facilitated the emergence of language.

Because of the xenophobic and racist prejudices that shape current political events in the United States, Europe, and elsewhere, it is essential that details about Nazism, including the Nazi euthanasia program, continue to be deliberated.

[4] In response, in 2007 with an international team of experts, Falk compared detailed maps of imprints left on the ancient hominid's braincase (endocasts) with those from microcephalic individuals and concluded that LB1, indeed, represented a new species that may have been descended from either Homo erectus or an earlier small-bodied hominin.

[citation needed] Falk's team have repeatedly asserted that their findings confirm that the species cataloged as LB1, Homo floresiensis, is definitely not a human born with microcephalia — a somewhat rare pathological condition that still occurs today.

Falk led a team that described the entire cerebral cortex of Albert Einstein in 2013,[5] and collaborated with Weiwei Men et al. in analyzing his corpus callosum.

Falk noted that the cerebral cortex is a highly evolved part of the human brain and that it facilitates conscious thought, planning, language, social skills, and scientific, artistic, and musical creativity.

These parts of the brain also evolved, and they are extremely important for processing memories, gut-level feelings, and social interactions in ways that set humans apart from other animals.

In 2018, Falk and colleagues published an in vivo magnetic resonance imaging study of the cerebral cortices of eight adult chimpanzees in which they identified sulcal patterns and compared them to those known from australopithecines and Homo naledi.

This study showed that the frontal lobe sulcal patterns of australopiths (and H. naledi) were not derived compared to extant apes, contrary to Falk's 2014 paper.Falk, D.; Zollikofer, C.P.E.