Two weird, mammal-like reptiles that sort of looked like scaly rats, each smaller than a loaf of bread, roamed ancient Brazil about 235 million years ago, likely dining on insects the predators snagged with their pointy teeth, a new study finds. "These new fossils help [us] understand in more detail the evolution of pre-mammalian forms that gave rise to the group of mammals, in which we humans (Homo sapiens) are included," the study's lead author, AgustÃn Martinelli, a paleontologist at the Federal University of Rio Grande do Sul in Brazil, told Live Science in an email.
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