Send the following on WhatsApp
Continue to ChatSeconds In A Year / 40 Things Your 1st Grader Needs to Know for 2nd Grade - Time of 9 192 631 770 periods of the radiation corresponding to the transition between the 2 hyperfine levels of the ground state of the caesium 133 atom at 0 k (but other seconds are sometimes used in. - https://can-nao.blogspot.com/2021/06/seconds-in-year-40-things-your-1st.html