Space
Venus takes longer to rotate once than to orbit the Sun.
Venus rotates once in about 243 Earth days, while one Venusian orbit takes about 225 Earth days. A sunrise-to-sunset cycle on Venus lasts about 117 Earth days.
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Read today’s fact ↗TODAY’S FACT Tuesday, October 27 · UTC
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Nature#025
The Great Barrier Reef faces several documented environmental pressures.
AIMS lists marine heatwaves associated with climate change, cyclones, and crown-of-thorns starfish outbreaks among pressures on the Reef.
Australian Institute of Marine ScienceRead fact ↗
Nature#024
The Great Barrier Reef is the largest coral system on the planet.
The Australian Institute of Marine Science describes it as the largest coral system on the planet, with almost 3,000 individual reefs covering 344,400 square kilometers.
Australian Institute of Marine ScienceRead fact ↗
Animals#023
Crows can remember people who wronged them for years.
The University of Washington page says studies have found crows remembering people who wronged them for as long as 17 years in some cases.
University of WashingtonRead fact ↗
Animals#022
American crows can recognize individual human faces.
The University of Washington says American crows can recognize individual human faces, use tools, and pass information to other crows.
University of WashingtonRead fact ↗
Science#021
Ice floats because its molecular lattice spreads molecules farther apart.
The USGS explains that ice molecules align in a regular lattice, leaving them more spread out than in liquid water and making ice less dense.
U.S. Geological SurveyRead fact ↗
Science#020
Ice is about nine percent less dense than liquid water.
The USGS says freezing decreases water’s density by about 9 percent, which makes ice less dense than liquid water and causes it to float.
U.S. Geological SurveyRead fact ↗
Everyday life#019
Water density is roughly one gram per milliliter.
The USGS says water density is roughly 1 gram per milliliter, while noting that it changes with temperature and with substances dissolved in the water.
U.S. Geological SurveyRead fact ↗
Nature#018
Lightning heat can vaporize water inside a tree.
The National Weather Service says lightning heat can vaporize water in its path through a tree, possibly making the tree explode or blowing off bark.
National Weather ServiceRead fact ↗
Science#017
Lightning can heat air to about 50,000 degrees Fahrenheit.
The National Weather Service says lightning can heat the air it passes through to 50,000°F, about five times hotter than the Sun’s surface.
National Weather ServiceRead fact ↗
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