diff --git a/README.md b/README.md
index a55dbae..6d6f212 100644
--- a/README.md
+++ b/README.md
@@ -218,3 +218,19 @@ const c = [1, 2, 3];
 strictSuperset(a, b); // true
 strictSuperset(a, c); // false
 ```
+
+### intersects
+
+```ts
+declare const intersects: (a: Iterable<any>, b: Iterable<any>) => boolean;
+```
+
+Takes two iterables and returns true if the two intersect.
+
+```js
+const a = [1, 2];
+const b = [2, 3];
+const c = [3, 4];
+intersects(a, b); // true
+intersects(a, c); // false
+```
diff --git a/index.ts b/index.ts
index 8382cb1..0991475 100644
--- a/index.ts
+++ b/index.ts
@@ -41,6 +41,9 @@ const superset = (a: Iterable<any>, b: Iterable<any>): boolean => subset(b, a);
 const strictSuperset = (a: Iterable<any>, b: Iterable<any>): boolean =>
   strictSubset(b, a);
 
+const intersects = (a: Iterable<any>, b: Iterable<any>): boolean =>
+  and(a, b).size > 0;
+
 export {
   set,
   and,
@@ -55,5 +58,6 @@ export {
   subset,
   strictSubset,
   superset,
-  strictSuperset
+  strictSuperset,
+  intersects
 };
diff --git a/test.ts b/test.ts
index d68840c..d903824 100644
--- a/test.ts
+++ b/test.ts
@@ -13,7 +13,8 @@ import {
   subset,
   strictSubset,
   superset,
-  strictSuperset
+  strictSuperset,
+  intersects
 } from "./index";
 
 assert.deepEqual(set(), new Set());
@@ -64,3 +65,6 @@ assert(strictSuperset([4, 3, 2, 1], [1, 2, 3]));
 assert(!strictSuperset([3, 2, 1], [1, 2, 3]));
 
 assert(!strictSuperset([2, 1], [1, 2, 3]));
+
+assert(intersects([1, 2], [2, 3]));
+assert(!intersects([1, 2], [3, 4]));