SAVE $320: The Shark AI Ultra Robot Vacuum is on sale at Amazon for $329.99, down from the usual price of $649.99. That's a 49% discount. Vacuuming is something that's always on the to-do list.

There are three types of available Shark robotic vacuums: Shark ION, Shark IQ and Shark AI. Shark robotic vacuums have two advanced brushroll technologies: powerfins and self-cleaning brushrolls.

While juvenile males frequently appear in well-documented feeding hotspots around the world, newborn whale sharks are extremely rare to see. Scientists have long wondered where these gentle giants ...