How likely you think something is to happen depends on what you already believe about the circumstances. That is the simple ...

Most trees can be easily identified by inspecting their leaves, seed pods, flowers, bark, or shape.

Discover what a log-normal distribution is, its financial applications, and how to calculate it, including using Excel for ...

Bayes' theorem is a formula for calculating the probability of an event. Learn how to calculate Bayes' theorem and see examples.

Extinction of animals and plants. Read scientific research on the dinosaur extinction, future mass extinctions, and endangered species. What can be done?