For months you have been saying, "I can't wait until my baby can walk." "I can't wait until my baby can talk." And suddenly---your baby can! Suddenly, your baby is a toddler---a walking, talking,...
Exploding stars!
Nearly a thousand years ago, in the year 1054, a new star suddenly appeared in the sky. It was tremendously bright---so bright it could be seen even in daytime. For two years, the strange new star...