Then Carlos said his sensors were picking up magnetic patterns ahead.

Probably a magnetic pattern imprinted in it, no way to fake it.

There is a unique magnetic pattern that is the actual key.

"And this key's magnetic pattern is the key for a particular message."

The key I possess has a magnetic pattern containing the key to an important message.

Another head "reads" the magnetic pattern the same way.

"The magnetic patterns of that star are most unusual," the Hindmost continued.

Instead of recording analog magnetic patterns, however, the tape head records binary code.

By analyzing magnetic patterns in the rocks, the scientists determined their ancient latitude.

The map shows clearly how the magnetic pattern relates to the ridge.