These 5 banknotes are hiding unbelievable secrets. From UV ink to mysterious donuts; from grinning devils to shy spiders - this video will let you in on those secrets.

Let's be honest: how many of the oven symbols do you actually use? Two, three... if you're lucky? If you've ever looked at ...

Understand the common markings found on $20 bills and other US currency and random doodles, debunking tracking myths.

Spring is the perfect time to add some healthy habits to your routine. We asked top doctors, dietitians and wellness experts ...