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Science & Space

65 recent checks in this topic

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Illustration of a white Sun against the dark background of space.
Science & Space

Does the Sun appear white when viewed from space?

Yes. The Sun's mixture of visible wavelengths appears white. Earth's atmosphere can make it look yellow, orange or red, especially near sunrise and sunset.

Verdict
True
Verification confidenceHigh
Illustration comparing Mercury's cratered surface with the cloud-covered planet Venus.
Science & Space

Is Mercury the hottest planet in our solar system?

No. Venus is hotter despite being farther from the Sun. Its dense atmosphere traps heat, while Mercury has extreme differences between daytime and nighttime temperatures.

Verdict
False
Verification confidenceHigh
An octopus resting on a rocky seabed with its arms spread around its body.
Science & Space

Do octopuses really have three hearts?

Yes. Two hearts pump blood through the gills, while a third circulates it through the rest of the body.

Verdict
True
Verification confidenceMedium
Tall bamboo canes with clearly visible nodes and leafy branches in a bamboo grove.
Science & Space

Is bamboo a type of grass?

Yes. Bamboos belong to the grass family, Poaceae. Some grow tall and develop woody stems, but their tree-like appearance does not change that classification.

Verdict
True
Verification confidenceHigh
An open pot of boiling water with a thermometer against a mountain backdrop.
Science & Space

Does water always boil at 100°C?

No. Water's boiling temperature depends on pressure. In an open container at higher elevations, lower air pressure allows it to boil below 100°C.

Verdict
False
Verification confidenceHigh
A piece of pumice floating in a clear container of water above a denser stone on the bottom.
Science & Space

Can some rocks float on water?

Yes. Some pumice can float because gas-filled pores lower its overall density. Water entering those pores can reduce buoyancy, so floating need not last.

Verdict
True
Verification confidenceHigh
A pale Moon visible above a landscape under a clear blue daytime sky.
Science & Space

Can you see the Moon during the day?

Yes. The Moon reflects sunlight and can be bright enough to see against a daytime sky. Its visibility depends on its position, phase and sky conditions.

Verdict
True
Verification confidenceHigh
A hydrophone suspended underwater beneath the ocean surface.
Science & Space

Does sound travel faster in water than in air?

Yes. Sound travels roughly four times faster in water than in air under typical conditions. The exact speed depends on the medium and its conditions.

Verdict
True
Verification confidenceHigh