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Granite, one of the hardest rocks on Earth, is believed to have been formed during the Paleozoic Era. This granular igneous rock is often used in the building industry.
Soil formation is the result of the interaction of five factors: parent material, climate, topography, organisms and time.
Tertiary is an old unofficial but still widely used term for the geologic period from 65 million to 2.5 million years ago. The Tertiary is divided into five epochs: Paleocene, Eocene, Oligocene, Miocene, Pliocene.
This plant that originates from China has become an invasive species.
Watch this video to find out whether tap water and table salt are able to conduct electricity.
When masses of cold and warm air meet, weather fronts develop.
The four outer planets (Jupiter, Saturn, Uranus and Neptune) do not have solid surfaces, thus they are called gas giants.
Mercury, Venus, Earth and Mars may have they formed in much the same way, but only the Earth is lucky enough to be in the habitable zone.
Developed nearly 500 years ago, it is a variant of the Julian calendar. Today it is the most widely used calendar.
What secrets does the Moon have? Who were the first men on the Moon? You’ll find out everything from this video.
Curious little animal living in underground burrows in the African savannahs.
The acid in vinegar dissolves materials containing calcium carbonate like eggshell and snail shell.
The best known cartilaginous fish, sharks, do not chew their food; they use their razor-sharp teeth only for biting and tearing.
A historic region of Croatia; its economy is mostly based on tourism and fishing.
Find out whether the marble reaches the finish line faster on the straight or on the curved slope.
Photos taken by professional cameras at a slow shutter speed can reveal details invisible to the naked eye.
Look up to the sky on a clear night at the time of the New Moon and enjoy the spectacular view of myriad of stars.
As seasons change, we see different constellations in the night sky. The North Star is easy to identify in a picture taken with long exposure time, as it does not appear to move.
Photographs taken at night with long exposure time may appear like they were taken during the day.
We can observe quite interesting astronomical phenomena when the Earth, the Sun and the Moon align.
Let’s make paper birds! The more colour we use, the more beautiful our birds will look.