Photo Series of the Day: The first photos of the so-called Fukushima Fifty -- the fifty heroic nuclear reactor employees working around the clock to prevent a meltdown at the Fukushima Daiichi power plant -- have finally emerged.

An additional 150 workers have since joined the original fifty, of which five are believed to

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Know This:

• Nuclear Crisis Update: Reactors doused with water from helicopters, results unclear; Fukushima No. 2 reactor team member

Explaining Sh*t To Kids of the Day: Nuclear Boy Has a Stomachache: Apparently Japan has been airing this animated short on national television in an effort to explain the nuclear crisis to children.

Most terrifying Schoolhouse Rock! episode ever.

[thanks kat!]

Don't Panic of the Day: You might want to hold off on ducking and/or covering: According to Nuclear Regulatory Commission chairman Gregory B. Jaczko, the radioactive plume currently making its way to the west coast from Japan's Fukushima Daiichi nuclear plant, poses no immediate health risk.

"You just aren’t going to have any radiological material that, by the time it traveled those large di

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Know This:

• Nuclear Crisis: United States Nuclear Regulatory Commission chairman: Radiation levels at Fukushima Daiichi "extremely high," no water in spent fuel pool; worth bookmarking: Status of the Nuclear Reactors at the Fukushim

Crisis Explainer of the Day: CNN offers a thorough, illustrated explanation of just what in the doomsday is going on with Japan's crippled nuclear reactors.

[bestofyt.]

Related: Union of Concerned Scientists say radiation plume could reach tokyo.<

2011 Sendai Earthquake News Round-Up:

Nuclear Crisis: Second hydrogen explosion occurs as predicted at troubled Fukushima Daiichi's No. 3 reactor (see video below); explosion damages building, injures workers, leaves reactor container intact; radiation levels