A human embryo has its first heartbeat at the age of three weeks, when the heart of the embryo looks like a tube. As it begins to beat, it starts the blood circulating through the few blood vessels that have formed around it.
No. Identical twins do not have the same fingerprints.
The explosion of a star is called a supernova and is estimated to release 10^49 ergs or 1 followed by 49 zeros. By comparison, pronouncing an average syllable releases 200 ergs, and the first atom bomb produced 1021 ergs.
The moon’s diameter is 2,160 miles. The earth’s diameter at the equator is 7,926.68 miles.
Fingerprints provide traction for your fingers, helping you to grasp things.
The colors red, orange, yellow, green, blue, indigo, violet make up a rainbow.