During a laboratory experiment, a student heated some pale green crystals in a dry boiling tube. On heating, the crystals turned brown, and a strong smell resembling burning sulphur was observed.
The original conceptualization of REM sleep as paradoxical sleep was based on its EEG resembling wakefulness and its association with dreaming. Over time, the concept of paradox was expanded to include various associations with REM sleep, such as ...

During REM sleep, the brain becomes highly active, resembling its state during wakefulness. Understanding the specific brainwave patterns that occur during this phase provides insight into the complex processes happening while we are asleep.

As we can see from the illustration, Resembling That Observed During has many fascinating aspects to explore.
The orb-weaving spider Cyclosa longicauda from Peru constructs unique stabilimenta from detritus and silk that visually resemble a larger spider. This previously undescribed behavior likely functions...

As we can see from the illustration, Resembling That Observed During has many fascinating aspects to explore.
The brain waves associated with this stage of sleep are very similar to those observed when a person is awake, as shown in Figure 5, and this is the period of sleep in which dreaming occurs.
They develop from either the ovaries or testes, the primordial gonads.