共找到 20 条结果
Why do beaches today have seashells from clams and snails instead of brachiopods。 A new study suggests the answer lies in Earth's greatest mass extinction, when warming oceans and falling oxygen levels wiped out animals that couldn't adapt。 Species with body plans and metabolisms better suited to the changing conditions survived and went on to domi
Citizen scientists have helped researchers solve a long-standing mystery about how parental care evolved in harvestmen。 Using photos and observations from iNaturalist, scientists more than doubled the known cases of egg-guarding behavior and discovered that maternal and paternal care followed different evolutionary paths。 The project, completed in
Many of the body's biggest flaws are the result of evolution building on old designs instead of starting over。 Our spine, eyes, teeth, pelvis, and even certain nerves all reveal compromises that worked well enough for survival but still leave us prone to pain, injury, and disease。 Structures like the appendix and ear muscles also remain because the