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TIL Frog saliva is a non-Newtonian fluid. The fluid is initially runny when the frog's tongue first hits its prey helping it spread along the surface of their food. After the initial pressure drops the fluid gets gooier and stickier allowing the prey to be quickly brought into the frog's mouth.

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v1ryx TIL that Bram Stoker's 'Dracula' wasn't originally intended to be presented as a work of fiction. His editor rejected the manuscript believing it would cause widespread panic, given that Jack the ripper was active in London at the time. The version we read starts on page 102 of the original script.
6pY7 TIL the metal band of a Mason Jar is suppose to be removed for storage to prevent residual water between the jar threads and the lid from rusting the band. If the jar seal is properly formed, internal vacuum will keep the lid tightly on the jar.
N76Lb TIL in 1905, in Jacobson v. Massachusetts, the Supreme Court ruled that states could enforce rules that restrain individual liberty, in favor of conserving the safety of the community
j40X TIL that in 1985 JAL flight 123, a Boeing 747 flying from Tokyo to Osaka, lost its tail mid-flight. During the 32 minute descent and then crash into the mountains, many passengers wrote goodbye notes to their loved ones on airplane drink napkins. Of the 520 passengers on board, 4 survived.
X0eDE TIL that roughly 90% of normal matter exists in the "empty" space between galaxies, with the remaining 10% existing in galaxies, stars, planets, etc.