Science and education (48)

Speaking out loud Good idea  Dark, puffy clouds in the sky. Weather phenomenon Light bulb graphics set Man pondering the problem Business scream The man during the lecture Good idea Photo of a soccer goal on green grass. Soccer goal net. Traffic cone Football gate. Soccer goal net. Autumn park. Swings in the autumn park. Photo of the swings. Swings for children in the park.  Artistic reproduction of the Cloth Hall on the Market Square in Cracow Photo of the wind propeller Photo of a metalworking machine. Metallurgical plant. Photo of the clouds. Dark puffy clouds in the sky. Photo of a windmill's blades in the sky Wind turbine against the sky Ecological energy sources obtained from windmills Photo of the wind propeller Photo of an old antique cannon. Model of the Cloth Hall in Cracow. Photo of a mock-up reflecting the building of the Cracow Cloth Hall. Vise close up. Vice in the old forge.  Photo of fallen leaves. Falling leaves. Close-up of lying autumn leaves. Leaves fell off the tree. Photo of clouds. Dark clouds in a gray, gloomy sky. The leaves that have fallen from the tree. Colorful leaves in the forest.  Colorful leaves in the forest. Photo of yellow leaves.  A cannon standing outside the city walls. A large cannon standing in front of the city walls. Photo of the vise. Rusty vice.  A large cannon standing in front of the city walls. Photo of a cobweb covering old tools. Old things. Dark clouds in the sky. Clouds against the sky. Puffy clouds. Clouds in the blue sky. Forest landscape. The leaves that have fallen from the tree.  Photo of autumn leaves under a tree. Deciduous tree leaves. Cloudy sky. Dark, rainy clouds in the sky. Dark, rainy clouds in the sky.  Clouds against the sky. Photo of colorful soap bubbles. Soap bubbles. Shiny soap bubbles. Floating soap bubbles. Cloudy sky. Dark clouds in a gray, gloomy sky. Dark, rainy clouds in the sky. Cloudy sky. Dark clouds before the rain. Cloudy sky. TV tower in Dresden. Dark clouds in a gray, gloomy sky. Gray textured storm clouds of bad weather.  Clouds against the sky. Photo of clouds. Gray textured bad weather storm clouds. Dark clouds before the rain.