Curious why they don't go brown. Doesn't seem natural.
Edit. Here's why.
An avocado that doesn't turn brown is called a "non-browning avocado" and is typically achieved through genetic modification, where scientists have edited the avocado's genes to disable the enzyme responsible for browning when exposed to air; this process is often referred to as a "gene-edited avocado" and is currently being researched by companies like GreenVenus, allowing the avocado flesh to stay fresh longer without browning.