Eye circles plague many of us at one time or another. Some of us have them all our lives! But what causes them? We have the answers... or a few of them. Plus, we ask if giraffes find it tricky to vomit...

• What causes red eye when you take a flash photograph? - Questions
• How Does Laser Eye Surgery Work? - Podcasts
• Why do we get dark circles around our eyes? Is it due to lack of sleep? - Questions
• Listen Up! The Science of Hearing... - Podcasts
• Why do some animals dump indiscriminately? - Podcasts
• Cracking Chronic Fatigue - Podcasts