Assorted Links

• Older eyes block blue light more than young eyes, which may cause sleep problems.
• Caroline Rodgers makes a case (29 slides) that autism is often caused by prenatal ultrasound. This link is from the comments on my previous post about the danger of prenatal ultrasound.
• Why did Deep Throat leak the secrets that brought down President Nixon?
• Do bitters make a difference? A taste test. A better test would have been simpler: to ask, many times in paired comparisons, which is better: Drink X with bitters or drink X without bitters?

Thanks to David Cramer, Jahed Momand and Nancy Evans.