WATER BEARS IN SPACE! The water bear, or TARDIGRADE, is so small it measures in angstroms, not millimeters. The Swedes sent some into space in The tiny critters survived the vacuum of space, the intense cold and radiation for 8 days!
Anatomy of Tardigrada Demonstrating the appearance of gravid tardigrades, mouthparts, and different claw-forms and exterior textures. The Tardigrada of the Scottish Lochs: Transactions of the Royal Society of Edinburgh, Vol. XLI - Part III - No.