Apr 2, 2024 · Leveraging diamagnetism, which gives all matter a degree of weak magnetism, all one needs to levitate a frog is a magnetic field 1,000 to 10,000 times stronger than a refrigerator magnet, or 10 times stronger than an MRI machine, Geim explained.

A group of researchers in the Netherlands and in England has made a frog levitate in a magnetic field. Although the feat might seem no more than a curiosity, researchers say that the floating amphibians may lead the way to a cheap alternative to space-based science experiments.

(12 Apr 1997) English/NatBritish and Dutch scientists using a giant magnetic field have made a frog float in mid- air, and might even be able to do the same ...

Diamagnetic forces acting upon the water within its body levitating a live frog inside the 3.2 cm vertical bore of a Bitter solenoid at the Nijmegen High Field Magnet Laboratory, Nijmegen, Netherlands.

Did the frog become magnetized? Several videos on the internet show small biological objects apparently defying gravity by floating in the bores of research magnets. An example is shown below.

Contrary to our intuition, apparently nonmagnetic substances can be levitated in a magnetic field and can stabilize free levitation of a permanent magnet. Most substances are weakly diamagnetic and the tiny forces associated with this property make the two types of levitation possible.

May 21, 2014 · A live frog levitates inside the vertical bore of a Bitter solenoid in a magnetic field at the Nijmegen High Field Magnet Laboratory.

Apr 12, 1997 · USING a giant magnetic field, scientists at the University of Nottingham and the University of Nijmegen in the Netherlands have made a frog float in mid-air. The levitation trick works because...

May 6, 1997 · The animals - a small frog, grasshoppers, and fish - floated in mid-air when placed in a strong magnetic field of 16 Tesla. By comparison, an audio speaker's magnetic field is between .001 and...

Mar 24, 2015 · The belief was that there was no way for stable magnetic levitation to occur. This result from classical physics was proved mathematically by Samuel Earnshaw in 1842, and is known as Earnshaw’s theorem. Simply put, the theorem says that no object can be held stably by magnetism and gravity alone.