You can tell by counting the rings inside it if you cut a part of the tree away. Here, Ian Guest explains it in more depth!

Discover how tree rings reveal the age and growth history of a tree, with each ring representing a year's growth. The spacing between rings indicates the environmental conditions during that year, such as weather and sunlight, offering insights into past climates and tree health. This fascinating natural record helps us understand the impact of weather on plant growth over time.