Many explanations for Eocene climate change focus on the Southern Ocean—where
tectonics influenced oceanic gateways, ocean circulation reduced heat transport, and …

Lamniform sharks are apex marine predators undergoing dramatic local and regional
decline worldwide, with consequences for marine ecosystems that are difficult to predict …

Sharks (Selachimorpha) are iconic marine predators that have survived multiple mass
extinctions over geologic time. Their prolific fossil record is represented mainly by isolated …

Shark populations have been decimated in recent decades because of overfishing and
other anthropogenic stressors; however, the long-term impacts of such changes in marine …

The extinct giant shark Otodus megalodon is the last member of the predatory megatoothed
lineage and is reported from Neogene sediments from nearly all continents. The timing of …

Humans have dramatically transformed ecosystems over the previous millennia and are
potentially causing a mass extinction event comparable to the others that shaped the history …

We describe a new shark fauna from Canada's westernmost Arctic island, Banks Island,
Northwest Territories, based upon thousands of shark teeth recovered from lower–middle …

Taphonomic and diagenetic processes were assessed on samples of the deep-sea
hydrocoral Stylaster erubescens. Deep-sea hydrocoral geochemistry could be a significant …

Understanding heterogeneity in species richness between closely related clades is a key
research question in ecology and evolutionary biology. Multiple hypotheses have been …

Sibert and Rubin (Reports, 4 June 2021, p. 1105) claim to have identified a previously
unidentified, major extinction event of open-ocean sharks in the early Miocene. We argue …