worth knowing Inexperienced muscles hangover after exercise. © freeimages Read out Whether moving crates to the third floor or riding the bike for the first time after months in good summer weather - the next few days are causing muscle soreness. Just as against the hangover after too much alcohol, there are a number of home remedies: Heat, protein drinks, massage or further training to combat the pain in the muscles.

worth knowing Winter moon with partly colored corona © Radoslaw Ziomber Read out The full moon shining in the night sky is a fascinating sight. Clearly, the silvery disc stands out from the surrounding darkness. Sometimes, however, the boundaries are not quite so clear: Then the moon appears surrounded by a bright yard.

worth knowing Hidden objects are indicated by markings on the terahertz scanner. © Pianist Berlin / cc by.sa 3.0 Read out He should bring more security, accelerate processes and many airports have him now: the body scanner. Using terahertz radiation, he displays hidden objects on our body, such as weapons or explosives.

worth knowing The Star of Bethlehem is said to have led the three holy kings to the manger © alexandarilich / thinkstock Read out "And, behold, the star that they had seen in the East, walked before them, until it came to rest above the place where the child was." For the Bible, the thing is simple: the three wise men from the East discover one new star, follow him and arrive shortly after Jesus birth in Bethlehem.

worth knowing Ice Cubes: Water behaves differently than most liquids when frozen. © freeimages Read out From burst bottles in the freezer to frost damage on the road: When water freezes, it takes more space than when it's liquid. For most liquids and gases it is different, they contract when cooled.

worth knowing There is a lot of chemistry and physics in New Year's Eve fireworks - we explain how it works. © DeltaWorks / pixabay Read out A New Year's Eve without fireworks? This is unthinkable for most Germans. In Germany, we spend around 110 million euros a year on boulders, bombs and rockets - at least.

worth knowing A short nap at noon will let us recharge our batteries. © MOnkey Business / thinkstock Read out In the morning we are often fit at work. Intellectually and physically resilient, demanding work is easy to handle. After the lunch break, however, this often looks quite different. Well saturated, we also close our eyes in the team meeting and we can not concentrate on the lengthy explanations from the boss.

worth knowing Studies confirm our assumption: the older we become, the faster time seems to pass. Comstock Images / Pixabay Read out Many people feel that time goes by, the older they get older. Especially when we think back, it seems like this. Then five years in childhood often seem like an eternity, while the last years of our lives seem to have been far too fast

worth knowing Snowdrops are usually the first spring messengers. But how do you know when to bloom? © oldiefan / pixabay Read out The days are getting longer, the temperatures are rising - gradually it will be spring. Now, nature soon awakes again from its hibernation: The first tips of fresh green push themselves out of the ground, the buds of many shrubs and trees are thicker and crocuses, snowdrops and daffodils only seem to wait to finally be able to bloom.