diff --git a/src/basic-syntax/slices.md b/src/basic-syntax/slices.md
index b703ffc2..b7f5ce86 100644
--- a/src/basic-syntax/slices.md
+++ b/src/basic-syntax/slices.md
@@ -14,3 +14,17 @@ fn main() {
 
 * Slices borrow data from the sliced type.
 * Question: What happens if you modify `a[3]`?
+
+<details>
+
+* We create a slice by borrowing `a` and specifying the starting and ending indexes in brackets.
+
+* If the slice starts at index 0, Rust’s range syntax means we can drop the starting index. 
+    
+* The same is true for the last index, so `&a[2..a.len()]` and `&a[2..]` are equal.
+
+* `s` is a reference to a slice of `i32`s. Notice that the type of `s` no longer mentions the array length. This allows us to performing computations on slices of different sizes.
+ 
+* Slices always borrow from another object. In this example, `a` has to remain 'alive' so we can take a slice from it. 
+
+</details>