Kısaca
Most of the universe may be invisible: dark matter emits no light, yet gives itself away through gravity. Galaxy rotation and lensing hint at an unseen ‘skeleton.’
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Kısaca
Most of the universe may be invisible: dark matter emits no light, yet gives itself away through gravity. Galaxy rotation and lensing hint at an unseen ‘skeleton.’
UV light can damage DNA, but cells repair much of it with dedicated mechanisms. Without these systems, mutation load would build fast and life would struggle to persist.
Auroras form when charged particles from the Sun are guided by Earth magnetic field and excite atoms high in the atmosphere. Colors reveal which gases glow at which altitudes.
The Sun"s diameter is 109 times Earth"s. Its volume is massive enough to contain 1.3 million Earths.
Mantis shrimp can distinguish light in unusual ways using many photoreceptor types. Unlike our three-channel color system, it uses a more segmented spectral sampling.
If DNA from one human cell were stretched out, it would approach 2 meters. The surprising part is how it is packed neatly into a microscopic nucleus.
The aging process of cats is quite interesting compared to humans. In their first year, they reach the equivalent of 15 human years, and by their second year, they total 24 human years.
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