Geographyrandom
The Sahara Desert Is Expanding
Changes in land use are causing the edges to turn into dry, barren ground.
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This week's facts
Animals 2026-08-17weekly
Octopuses Have Three Hearts
An octopus has one systemic heart that pumps blood to the body and two branchial hearts that pump blood to the gills. They also have blue blood, thanks to a copper-rich protein.
Food 2026-08-16weekly
Bananas are Berries, Strawberries aren't!
Botanically, a berry comes from a single flower with one ovary. Bananas qualify, but strawberries have seeds on the outside and develop from a flower with many ovaries.
Food 2026-08-10weekly
Honey Never Spoils
Archaeologists have found pots of honey in ancient Egyptian tombs over 3,000 years old that are still perfectly edible. Honey's low moisture and acidic pH make it hostile to bacteria.
Space 2026-08-03weekly
A Day on Venus Is Longer Than Its Year
Venus rotates so slowly that one full rotation (a Venusian day) takes 243 Earth days, while its orbit around the Sun takes only 225 Earth days.
Science 2026-07-29weekly
The Eiffel Tower Grows in Summer
Iron expands in heat, so the Eiffel Tower can grow up to 15 cm (6 inches) taller during hot summer months.
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Space
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Being about the size of Earth and about 40 light-years away from us in the constellation Cancer, 55 Cancri E is made entirely of diamond.
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