• Are coral reefs victims of their own past success?

      Renema, W; Pandolfi, JM; Kiessling, W; Bosellini, FR; Klaus, JS; Korpanty, C; Rosen, BR; Santodomingo, N; Wallace, CC; Webster, JM; et al. (2016-04-22)
    • Building Bridges. Response to Erkens and Hoorn: “The Panama Isthmus, ‘old’, ‘young’ or both?”.

      O'Dea, A; Aguilera, O; Aubry, M-P; Berggren, WA; Budd, AF; Cione, AL; Coates, AG; Collins, LS; Coppard, SE; Cozzuol, MA; et al. (American Association for the Advancement of Science: Science Advances, 2016-08-17)
    • Chronology of martian breccia NWA 7034 and the formation of the martian crustal dichotomy

      Cassata, WS; Cohen, BE; Mark, DF; Trappitsch, R; Crow, CA; Wimpenny, J; Lee, MR; Smith, CL (2018-05)
    • Disparate compound eyes of Cambrian radiodonts reveal their developmental growth mode and diverse visual ecology

      Paterson, John R; Edgecombe, GD; García-Bellido, Diego C (American Association for the Advancement of Science (AAAS), 2020-12)
      Radiodonts are nektonic stem-group euarthropods that played various trophic roles in Paleozoic marine ecosystems, but information on their vision is limited. Optical details exist only in one species from the Cambrian Emu Bay Shale of Australia, here assigned to Anomalocaris aff. canadensis. We identify another type of radiodont compound eye from this deposit, belonging to ‘Anomalocaris’ briggsi. This ≤4-cm sessile eye has >13,000 lenses and a dorsally oriented acute zone. In both taxa, lenses were added marginally and increased in size and number throughout development, as in many crown-group euarthropods. Both species’ eyes conform to their inferred lifestyles: The macrophagous predator A. aff. canadensis has acute stalked eyes (>24,000 lenses each) adapted for hunting in well-lit waters, whereas the suspension-feeding ‘A.’ briggsi could detect plankton in dim down-welling light. Radiodont eyes further demonstrate the group’s anatomical and ecological diversity and reinforce the crucial role of vision in early animal ecosystems.
    • Formation of the Isthmus of Panama

      O'Dea, A; Lessios, HA; Coates, AG; Eytan, RI; Restrepo-Moreno, SA; Cione, AL; Collins, LS; de Queiroz, A; Farris, DW; Norris, RD; et al. (2016-08-17)
    • Persistence of intense, climate-driven runoff late in Mars history

      Kite, ES; Mayer, DP; Wilson, SA; Lucas, AS; Stucky de Quay, G; Davis, Joel (American Association for the Advancement of Science, 2019-03-27)
      Mars is dry today, but numerous precipitation-fed paleo-rivers are found across the planet’s surface. These rivers’ existence is a challenge to models of planetary climate evolution. We report results indicating that, for a given catchment area, rivers on Mars were wider than rivers on Earth today. We use the scale (width and wavelength) of Mars paleo-rivers as a proxy for past runoff production. Using multiple methods, we infer that intense runoff production of >(3–20) kg/m2 per day persisted until <3 billion years (Ga) ago and probably <1 Ga ago, and was globally distributed. Therefore, the intense runoff production inferred from the results of the Mars Science Laboratory rover was not a short-lived or local anomaly. Rather, precipitation-fed runoff production was globally distributed, was intense, and persisted intermittently over >1 Ga. Our improved history of Mars’ river runoff places new constraints on the unknown mechanism that caused wet climates on Mars.