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Shortages are hitting so many aspects of the health care system. covid lockdowns earlier this year would force the closure of a ge health care plant that head to a shortage of contrast dye. >> you might not know where this turns out, but it's used by doctors in hospitals in diagnostic scans, like the mri. it's led to a delay in diagnosis and treatment for many patient. chief medical correspondent dr. sanjay gupta has been investigating the issue. so tell us where this comes up and without it what the impact is. >> yeah. it's contrast dye injected into the blood stream. it has iodine in it, whi...

You observed the brain scan of a 1998 subject involved in multiple murders. you found some interesting thing. >> i have been looking at the brain for 30 years. we have done 100 murderers, a thousand convicted felons. one of the most damaged brains that i had ever seen, he murdered his parents and then went to the school and killed students. there are brain health issues that steal people's minds. if your brain is not right, your behavior is notoriety. dan: you talk about the frontal cortex and how there was damage to this murderer's brain in the

You observed the brain scan of a 1998 subject involved in multiple murders. you found some interesting thing. >> i have been looking at the brain for 30 years. we have done 100 murderers, a thousand convicted felons. one of the most damaged brains that i had ever seen, he murdered his parents and then went to the school and killed students. there are brain health issues that steal people's minds. if your brain is not right, your behavior is notoriety. dan: you talk about the frontal cortex and how there was damage to this murderer's brain in the

You observed the brain scan of a 1998 subject involved in multiple murders. you found some interesting thing. >> i have been looking at the brain for 30 years. we have done 100 murderers, a thousand convicted felons. one of the most damaged brains that i had ever seen, he murdered his parents and then went to the school and killed students. there are brain health issues that steal people's minds. if your brain is not right, your behavior is notoriety. dan: you talk about the frontal cortex and how there was damage to this murderer's brain in the

An unusual experiment has cats staring at cat faces, while Dutch researchers go full sci-fi and "brain scan" an image out of the heads of humans and monkeys.