Home > Mental health > Brain > Fascinating phenomena 12 May 2019 WATCH: What if our brains were half the size? What if our brains were 50% smaller? 0 Related WATCH: How would human brain transplants change the world? WATCH: What if we used 100% of our brains? FEATURE DOCUMENTARY: What makes a genius? Ask CyberShrink » Talk Heart to heart forum » How brain injury affects you Transparent brains The human brain is packed with 100 billion neurons. It's responsible for everything we do, think and feel. It dictates our emotions, intelligence and overall mental health. But, what if our brains were 50% smaller?Image credit: iStock NEXT ON HEALTH24X When head injuries make life hard, suicide risk goes up 2018-08-28 11:00 More: BrainFascinating phenomena advertisement Other news Mental health WATCH: What if everyone had superpowers? Diet and nutrition The top 5 veggies to add to your diet Diet and nutrition “I lost 36 kilos when I started running and eating low-carb high fat” Medical WATCH: Why do heights give men awkward erections? Fitness Here's what you need to know about working out on the keto diet Medical Your DNA might determine whether you're a dog lover From our sponsors Chela-Fer® iron supplement is easy on the gut for better days Effective treatment for ADHD is available Live healthier » Most couples do not get divorced after infertility struggles IVF kids may have higher risk of autism Progesterone gel as good as injection for IVF Fertility treatments tied to higher odds for pregnancy complications For most women who cannot conceive naturally, in vitro fertilisation is very safe and effective, but it may involve a higher risk of complications during pregnancy. Heart health » Another day at the office – thanks to a defibrillator close at hand Statins help the heart, no matter what your age Even the smallest fitness gains could help you reduce the risk of a heart attack 5 women share exactly what it feels like to have a heart attack 'I felt like I had a pill stuck in my throat.'