There is no single speed at which things change. The rate of change can vary widely depending on the context. Some things change very quickly, like the weather or the stock market. Other things change very slowly, like the climate or the Earth's rotation. Some things may even appear to not change at all, like a mountain or a rock.

The speed at which things change can be influenced by a variety of factors, such as:

* Time scale: The rate of change can appear different depending on the time scale over which it is observed. For example, the climate may appear to change very slowly over the course of a few years, but very quickly over the course of millions of years.

* Complexity: The more complex a system is, the more things there are that can change and the more interactions there are between those things. This can make it difficult to predict how the system will change over time.

* Feedback loops: Feedback loops can either amplify or dampen the rate of change. For example, a positive feedback loop, such as the greenhouse effect, can cause a system to change very quickly. A negative feedback loop, such as the body's immune system, can help to stabilize a system and prevent it from changing too quickly.

In general, the speed at which things change is constantly increasing. This is due to a number of factors, such as the increasing interconnectedness of the world, the rapid pace of technological change, and the growing population. This means that we need to be more adaptable than ever before and be prepared for things to change quickly.