arXiv

Extra Credit builds an outline of arXiv's docs the first time your work uses it. Until then, start at the official documentation.

• arcsecond.io Multiple astronomy data sources
• Botlero Sourced, quoted specs for humanoid robots
• Chempirical Chemical compounds with physical data, reactions and substructure search
• CodeCogs Render LaTeX equations in PNG, GIF, SVG, EMF, PDF, JSON, or download formats with styling options
• CORE Access the world's Open Access research papers
• CycleCalcs Interpreted astronomy: sun and moon times, moon phases, planets, eclipses, seasons
• DataCite Search and retrieve DOI metadata for research datasets and publications
• ENA Nucleotide sequences, genomes and raw reads archive
• Europe PMC Life-science literature search with abstracts, citations and full-text links
• GBIF Global Biodiversity Information Facility
• iDigBio Access millions of museum specimens from organizations around the world
• iNaturalist Citizen-science wildlife observations with species identification and mapping