Listen to the full series on BBC Sounds. Hans Geiger and Ernest Marsden tested the plum pudding model. They aimed beams of positively-charged particles at very thin gold foil. These particles ...

Everyone at that time imagined the atom as a "plum pudding." That is ... He realized that Rutherford's model wasn't quite right. By all rules of classical physics, it should be very unstable.

This plum pudding recipe is a take on a classic: Steamed cakes like this are a fixture on a traditional British Christmas table, popular around the holidays since at least the Middle Ages.

We also use a mold to make the pudding, rather than linen cloth as they used to. Every family's version is different, and we loved how this recipe is chock full of dried and candied fruits and nuts.

Everyone at that time imagined the atom as a "plum pudding." That is ... He realized that Rutherford's model wasn't quite right. By all rules of classical physics, it should be very unstable.

Listen to the full series on BBC Sounds. Hans Geiger and Ernest Marsden tested the plum pudding model. They aimed beams of positively-charged particles at very thin gold foil. These particles ...