Dark matter is matter that does not emit, absorb or reflect light, yet its gravity shapes galaxies and the whole universe. Ordinary matter, everything made of atoms, is only about 5 percent of the universe’s total content. Dark matter accounts for roughly 27 percent, and dark energy the remaining 68 percent or so. The evidence … Read more
Breed weight charts give a rough range, but they cannot tell you if your individual dog is at a healthy weight. Two Labradors of the same weight can be lean and overweight, depending on frame and muscle. Veterinarians use a hands-on method instead: the body condition score. Breed ranges are just a starting point Breed … Read more
Yes, it is generally fine to sleep with a tampon in if you put in a fresh one right before bed and change it as soon as you wake up, within 8 hours. The US Food and Drug Administration advises changing tampons every 4 to 8 hours and never leaving one in longer than 8 … Read more
