The role of diet in the rise of modern shark communities — ScienceDaily

The availability of prey and the ability to adapt to changing environments played key roles in the evolution of sharks. A new study, in which over 3,000 shark teeth were analysed, provides new insight into how modern shark communities were established. The results are published in the journal Current Biology.

The new research investigated the diversity of shark teeth from the final stages of the Mesozoic (approximately 80 million years ago) to the present day. In particular, it sought to understand why there are only 15 species of mackerel sharks living today (scientific name: Lamniformes), whereas there are more than

Read More

How modern food webs impact nutrition

Dr. Stefani Crabtree, an Environment and Society professor at USU, recently published research comparing ancient and modern human nutrition. Crabtree’s research focused on large-scale shifts in human nutrition at the population level which, she acknowledged, might not capture the diversity of diets among individual humans.

“There honestly is still quite a lot of variance in the human diet globally,” Crabtree said.

To learn more about what the narrowing of food webs means for nutrition on an individual level, I spoke with Dr. Carrie Durward, a Nutrition Specialist with USU Extension.

She said that in the 1800s, as more people moved

Read More