Tag Archive for 'Isthmus of Panama'

North American porcupines differ from the southern relatives in having more fur, a shorter tail and a bulkier frame.

Extinct North American Porcupine Had Long, Prehensile Tail

May 28, 2024 by News Staff

New World porcupines originated in South America and dispersed into North America between 4 and 3 million years ago. Prehensile-tailed porcupines today...

Cadena et al. found DNA traces in the 6-million-year-old carapace of a Lepidochelys turtle. Image credit: Edwin Cadena, Universidad del Rosario & STRI.

Scientists Find Tiny Traces of DNA in 6-Million-Year-Old Turtle Shell

Sep 29, 2023 by Enrico de Lazaro

Researchers from the Universidad del Rosario, the Universidad Nacional de Colombia, Smithsonian Tropical Research Institute, the Field Museum of Natural...

Time-calibrated tree of 2,244 butterfly species based on 391 loci and 150 amino acid partitions. Image credit: Kawahara et al., doi: 10.1038/s41559-023-02041-9.

Butterflies First Appeared in What is Now the Americas, Research Shows

May 16, 2023 by News Staff

Scientists from the Florida Museum of Natural History and elsewhere have sequenced 391 genes from nearly 2,300 butterfly species, sampled from 90 countries...