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FlipFact of the Day: Mercury and bromine are the only two elements that are liquid at room temperature.

There are only two knownย elements that are in a liquidย state at the temperature technically designated as “room temperature” (25ยฐC). These are bromine (Br), a reddish-brown fluid, and mercury (Hg), a toxic, shiny, silvery metal.

However, the metals francium (Fr), cesium (Cs), gallium (Ga), and rubidium (Rb) turn into liquid at slightly higher temperatures.

Today’s Science History Milestone: On September 9, 1908, aviator Orville Wright made the first hour-long airplane flight at Fort Myer, Virginia. His flight lasted 62 minutes and 15 seconds.

Still remember your 5th-grade science classes? Test your knowledge and see if you still remember these facts and fundamental concepts in human anatomy, biology, botany, and other branches of science. Click here to try the “Are You Smarter Than A Pinoy Fifth-Grader” Challenge.

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Cover image: Fotalia/Marcel