diamagnetic pull the needle
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Answer:
It is possible to levitate magnetically every material and every living creature on earth. Molecular magnetism is always present, although it is very weak and usually remains unnoticed. It might give you the impression that materials around us are mainly nonmagnetic. But this is not true. They are all magnetic. We call them ‘diamagnetic’. With magnetic fields high enough you can levitate all diamagnetic materials. At our lab, we develop and build magnets that have a very high magnetic fields. We use it to investigate molecules and materials. And show the world a levitating frog.
How does the frog fly?
To explain, we have to start at the beginning. All matter in the universe consists of small particles called atoms. Each atom contains electrons that circle around the core called nucleus. If you place an atom in a magnetic field (or a large piece of a matter containing billions and billions of atoms), electrons doing their circles inside don’t like this very much. They change their motion in the opposite direction of the external influence. They create their own magnetic field. The atoms behave as little magnetic needles pointing in the direction opposite to the magnetic field. There are a few materials (such as iron) whose atoms are a bit crazy and love to be in a magnetic field. Their magnetic “needles” are oriented in the same direction. But those are exceptions to the general rule.