Sample of test tubes. A healthcare provider donning a pair of green latex gloves in order to protect herself during her… Free Image from public domain license 
Sample of test tubes. A healthcare provider donning a pair of green latex gloves in order to protect herself during her… Free Image from public domain license 
View just before sunrise over the Arctic Ocean during IceBridge's transit flight from Fairbanks to Thule. Original from NASA… Free Image from public domain license 
Plate 14 : Group from the interior of the northern Temple of Ybsambul illustration from the kings tombs in Thebes by Giovanni… Free Image from public domain license 
Influenza virus experimentation with eggs. Original image sourced from US Government department: Public Health Image Library… Free Image from public domain license