Three discoveries challenged this foundation of magnetism, though. First, in 1819, Hans Christian rsted discovered that an electric current generates a magnetic field encircling it. Then in 1820, Andre-Marie Ampere showed that parallel wires having currents in the same direction attract one another. Finally, Jean-Baptiste Biot and Felix Savart discovered the Biot -- Savart law in 1820, which correctly predicts the magnetic field around any current-carrying wire.

Answer this question based on the passage: who discovered the magnetic field of electric current? Let's do a good job answering this.
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Stream of consciousness: The important part for answering this question is: First, in 1819, Hans Christian rsted discovered that an electric current generates a magnetic field encircling it.... The answer is Hans Christian rsted.

The present-day "Adult Adam" (Patton Oswalt) narrates every episode as taking place in "1980-something".

Answer this question based on the passage: who is the voice over on the goldbergs? Let's do a good job answering this.
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Stream of consciousness: The relevant information is: The present-day "Adult Adam" (Patton Oswalt) narrates every episode as taking place in "1980-something".... The answer is Patton Oswalt.

Context: "The pot calling the kettle black" is a proverbial idiom that seems to be of Spanish origin, versions of which began to appear in English in the first half of the 17th century. It is glossed in the original sources as being used of a person who is guilty of the very thing of which they accuse another and is thus an example of psychological projection.

Question: where does the saying calling the kettle black come from? Let's do a good job answering this.
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Stream of consciousness: The relevant information to answer the above question is: "The pot calling the kettle black" is a proverbial idiom that seems to be of Spanish origin, versions of which began to appear in English in the first half of the 17th century.... The answer is seems to be of Spanish origin , versions of which began to appear in English in the first half of the 17th century.