Bottlenose dolphins are sea mammals which use ultrasound for orientation.
This animation demonstrates how sonar works.
Marine mammals, the largest known animals to have ever existed.
This animation explains the most important characteristics of waves through sound waves.
Moles are small subterranean mammals with modified, spade-like forelegs.
Quetzalcoatlus was one of the largest known flying animals of all time.
It is a well-known phenomenon that the sound of an approaching sound source is higher than that of a receding one.
Waves play an extremely important role in many areas of our lives.
Dogs are the domesticated subspecies of grey wolves.
Subterranean rodents widespread in Central- and Eastern Europe.
Otters are semi-aquatic predatory mammals.
Red deer are even-toed ungulates, ruminants. Their males have spectacular antlers.
A mammal with features typical of reptiles: it lays eggs and has a cloaca.
The train operates between Paris and southern Germany, its cruise speed is 320 km/h.