Hello,

Intute: Science, Engineering and Technology
In fact, it is a yearbook of websites. Their database contains 34449 records.
The required level may be a little high, but I think it might be quite interesting...
The database is said to be updated by universities and scientific institutions.

Enjoy.

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Arbeit bringt Brot, Faulenzen Hungersnot.
Everything is possible. The impossible just takes longer.

I'm going to link this over to PHF if you don't mind. Thank you.

-Dan

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"I must not fear. Fear is the mind killer. Fear is the little death that brings total obliteration. I will face my fear. I will permit it to pass over me and through me. And when it has gone I will turn the inner eye to see its path. Where the fear has gone there will be nothing. Only I will remain." - The Litany Against Fear, "Dune" by Frank Herbert