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Explore transmutation among elements, isotopes, calculating half-life, radioactive decay, and spontaneous fission.
Enter daily for your chance to win one month of coffee and a teched-out teachers’ lounge makeover for your school! Enter Now>
On this day in 1967, The Vietnam War protesters marched in Washington, D.C.
Explore how much the universe depends on dark energy.
Lay down some bars with our latest teacher challenge that is inspired by “Hamilton’s America.” Dust off your mic and check it out!
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