Santa's Workshop has three elves who coach all of the other elves, and each one is proficient as a master elf in every category
they coach. Their names are Jingles, Merry, and Tinsel. There are five categories: cookies, tech toys, sports, dolls, and delivery. Using the clues, can you figure out which category each elf coaches? Clues 1. Jingles, Merry, and Tinsel each coach three different categories. 2. Jingles knows nothing about dolls. 3. Tinsel is the only one of the three who can find the mail room. 4. Merry is not good at matching equipment to the correct sport. 5. No category is coached by all three elves.
Gravity's Role in Making Stars. When a clump of interstellar gas and dust is small and dense enough, gravity plays a decisive role in turning that material into a new star.
