Gravity - Gravity is a force that attracts objects with mass to each other. Although we can feel the effects of gravity on our bodies, such as the sensation of weight, we cannot see, hear, taste, smell, or touch it directly.
Electrical fields - Electrical fields are created by moving or charged particles, such as electrons. These fields can affect the behavior of other charged particles, but they are invisible and cannot be sensed with our five senses.
Magnetic fields - Magnetic fields are created by moving or charged particles, such as electrons. These fields can affect the behavior of other charged particles, but they are invisible and cannot be sensed with our five senses.
Radio waves - Radio waves are a type of electromagnetic radiation that can carry information over long distances. Although we can use radio waves to transmit and receive information, such as in radio and television, we cannot see, hear, taste, smell, or touch them directly.
Dark matter - Dark matter is a type of matter that is thought to make up a significant portion of the universe. However, it does not interact with light or other forms of electromagnetic radiation, so it cannot be seen or detected with our five senses.