Anatomy and Physiology

What Are Tiny Worms? Common Types and How to Identify Them

Why Is My Period Always Early? Common Causes

How Big Are Women’s Eggs? The Largest Human Cell

Do All Chickens Lay Eggs? The Biology of Egg Laying

How Many Miles Away Can a Bear Smell?

Do Bears Really Sleep All Winter? The Facts on Hibernation

How Long Does IUD Spotting Last & What Is Normal?

How Many Frames Per Second Can Humans See?

Is a Tadpole a Frog? The Tadpole to Frog Transformation

Do Animals Get Periods? The Science of Animal Menstruation

Why Is My Cheek Swollen After Tooth Extraction?

How Many Scutes Does a Turtle Have?

Are Moose Bigger Than Bison? A Size Comparison

What Kind of Wood Do Termites Eat and Avoid?

Why Do I Twitch When I’m Nervous? The Biology Behind It

How Many Watts Can a Human Generate?

Can a Pimple Cause a Headache? The Biological Answer

Do Fingernails Continue to Grow After Death?

Is the Immune System and Lymphatic System the Same?

Why Does the Left Side of My Neck Hurt?