Blue tits  (Cyanistes caeruleus) from the Canary islands (circa 1920).
Scanned from Amazing Rare Things: The Art of Natural History in the Age of Discovery
Henrik Grönvold (1858–1940)

A cloudy filament of super-heated hydrogen across the Sun.
The Sun has weather too, in a sense. This “cloud” of charged gas is powered by the magnetic field that surrounds the Sun.
(via APOD)

Infrared View of the Milky Way Center

Star map of the Southern Hemisphere.

Pig skeleton by BioDivLibrary on Flickr.
[Die vergleichende Osteologie /.Bonn :In Commission bei Eduard Weber,1821-1838..biodiversitylibrary.org/page/40170362

European Southern Observatory / AFP / Getty Images
May 16, 2012. The peculiar galaxy Centaurus A (NGC 5128) pictured through the Wide Field Imager attached to the MPG/ESO 2.2-meter telescope at the La Silla Observatory in Chile. 
From violence in Colombia and a huge fire in Manila to soccer championships across Europe and the presidential handover ceremony in France, TIME’s photo department presents the best images of the week. See more here.

Image transferred from uncovered opposite plate.
From p. 289 of Nature Displayed in the Heavens and On the Earth by Simeon Shaw (1823). Original from Oxford University. Digitized July 11, 2008.

Amphisbaena fuliginosa, also known as the Black-and-white Worm Lizard, Speckled Worm Lizard or Spotted Worm Lizard

Royal boa. (1802) 
via NYPL

Pollen from ‘Ueber den Pollen’ by Julius Fritzsche Published 1837

Cosmic dust clouds in Messier 78

This image of the region surrounding the reflection nebula Messier 78, just to the north of Orion’s belt, shows clouds of cosmic dust threaded through the nebula like a string of pearls. (via ESO)

1908 Medical Illustration - The Arteries