Search results for “ Uli Roth”

Why do leaves change color in the fall

In fall, leaves of deciduous trees change color and our forests become colorful. The reason is that deciduous trees only survive the cold winter if they take some precautions. Author: ZDF/Terrax/Katharina Kohl/Florian Roth/Thomas Kutschke/Malik Alpoguz/Maximilian Mohr Translation & dubbing: alugha

Definition of xenophobia

The term xenophobia comes from Greek. Xenos - means "stranger" but also "guest" - and phobos translates as "fear". Thus, it means fear of the foreign. A dismissive attitude towards the unknown. Author: 3sat/nano/Eva Münstermann,Nicola Burfeindt/Uli Weinlein,Dirk Janßen/tricky Translation and dubbi

Rocks as water storage for plants

Plants can grow not only on soil-rich ground, but also on rocks. Due to their porosity, the rock layers lying beneath the thin upper layer of soil can store water. Author: ZDF/Terra X/Florian Roth/Thomas Kuschke/Jochen Rall/Maximilian Mohr Translation and dubbing: alugha Click here to watch more

Excessive immune response

In the so-called cytokine storm, larger and larger amounts of cytokines are released uncontrollably. They then also "mark" healthy cells and cause the immune cells to attack the body's own tissue. Authors: 3Sat/Nano/docuVista Filmproduktion/Marilena Schulte, Maike Wurtscheid/Jörg Becker, Sergios Ro

Danger from chronic inflammatory diseases

If the immune system remains permanently active, a smoldering fire occurs in the body. Inflammatory foci are constantly fueled - until they become chronic. This also destroys healthy tissue. Author: 3sat/nano/DOCUVISTA Filmproduktion/Marilena Schulte, Maike Wurtscheid/Jörg Becker, Sergios Roth/Tatj

How did the cat come to man?

In ancient Egypt, the ancestor of the domestic cat was revered and became the companion of people. From the realm of the pharaohs, the first tame specimens probably reached today's Europe with Roman soldiers. Author: ZDF/Terra X/Spiegel TV/ Nanje de Jong-Teuscher, Kirsten Hoehne/Anja Schütze, Uli W

Regenerative phase of an inflammation

In the regenerative phase, inflammation-resolving messenger substances are released. Macrophages of type M2 dispose of cell and tissue debris. At the same time, other immune cells begin the first repair measures. Author: 3sat/nano/DOCUVISTA Filmproduktion/Marilena Schulte,Maike Wurtscheid/Jörg Beck

The senses of wolves

Wolves have highly developed sensory organs. Their panoramic vision covers a visual field of about 240 degrees. Their hearing is also excellent but the hunters' most important sense is the sense of smell. Author: ZDF/Terra X/Spiegel TV/Kirsten Hoehne, Nanje de Joung-Teuscher/Anja Schütze, Uli Wein

Development phase of an inflammation

If a foreign body penetrates the skin, phagocytes in the damaged tissue are the first to react. So-called M1-type macrophages release pro-inflammatory messenger substances. These include prostaglandins. These hormones trigger a pain stimulus. Author: 3sat/nano/DOCUVISTA Filmproduktion/Marilena Schu

Black cats and superstition

Black cats were condemned at the time of witch-hunts as companions of Satan and allies of witches. Even today, they are occasionally still considered to bring bad luck. Author: ZDF/Terra X/Spiegel TV/Nanje de Jong-Teuscher, Kirsten Hoehne/Anja Schütze, Uli Weinlein/Tricky Source: https://haustiger

Dogs in ancient Rome

Lap dogs were probably showered with luxury and pampered as never before in history. But not all Romans wanted these little dogs. Hunting dogs were common as well: greyhounds, bloodhounds or massive Molossians. Source: https://www.zdf.de/dokumentation/terra-x/hunde-im-antiken-rom-creative-commons-