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The award-winning biological and medical sciences journal

PeerJ publishes the world's scientific knowledge through open access licensing. 4,037 peer-reviewed articles and 4,257 preprints since 2013.

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Fast, fair, and widely read. Our mission is to help the world efficiently publish its knowledge. Read more…
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Together we have over six decades of experience in scholarly communications at Nature, The Lancet, PLOS, Mendeley, SAGE, Stanford and many more.
Ancient petrified salamander reveals its last meal

Researchers identify frog bones within the stomach of a 35 million year old 'mummified' salamander fossil using advanced x-ray imaging techniques. At least six kinds of organs are preserved in almost perfect condition.

Paleontology Zoology
Jérémy Tissier, Jean-Claude Rage, Michel Laurin
20 October
Effects of GnRHa treatment during vitellogenesis on the reproductive physiology of thermally challenged female Atlantic salmon (Salmo salar)
Aquaculture, Fisheries and Fish Science Molecular Biology
144 views · 23 downloads
Kelli Anderson, Ned Pankhurst, Harry King, Abigail Elizur
20 October
Influence of current climate, historical climate stability and topography on species richness and endemism in Mesoamerican geophyte plants
Biodiversity Biogeography Ecology Environmental Sciences Plant Science
149 views · 26 downloads
Victoria Sosa, Israel Loera
20 October
The benefits of Tai Chi and brisk walking for cognitive function and fitness in older adults
Neuroscience Geriatrics Neurology Ophthalmology
140 views · 18 downloads
Zhiguang Ji, Anmin Li, Tian Feng, Xiaolei Liu, Yihong You, Fanying Meng, Ruoqing Wang, Jialing Lu, Chunhua Zhang
20 October
Oxygen-limited metabolism in the methanotroph Methylomicrobium buryatense 5GB1C
Ecology Microbiology
114 views · 17 downloads
Alexey Gilman, Yanfen Fu, Melissa Hendershott, Frances Chu, Aaron W. Puri, Amanda Lee Smith, Mitchell Pesesky, Rose Lieberman, David A.C. Beck, Mary E. Lidstrom
19 October
Range expansion of a fouling species indirectly impacts local species interactions
Biodiversity Conservation Biology Ecology Marine Biology
167 views · 18 downloads
Cori J. Speights, Michael W. McCoy
19 October
The neuroprotective effect of nicotine in Parkinson’s disease models is associated with inhibiting PARP-1 and caspase-3 cleavage
Biochemistry Molecular Biology Neuroscience Neurology Pharmacology
188 views · 39 downloads
Justin Y.D. Lu, Ping Su, James E.M. Barber, Joanne E. Nash, Anh D. Le, Fang Liu, Albert H.C. Wong
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