2 ideas from Live Science, each explained in a minute and credited to the original work. Free on Savvy.
At rest, a human heart beats roughly 60 to 100 times a minute, every minute, without ever fully stopping to rest. Multiply that out across an average 70-to-80-year lifespan and the…
— Live Science, How many times does a heart beat in a day? What about in a lifetime?
Veins under pale skin often look distinctly blue, and the claim that blood only turns red once it hits the air gets repeated often enough to sound settled. Is the blood actually bl…
— Live Science, Blood in Your Veins Is Not Blue, Here's Why It's Always Red