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How much does your immune system weigh? Now we have an answer

An adult human's immune system is made up of more than 1 trillion cells. In total, it weighs around 1 kilogram, depending on the size of the person

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Image of the Moon captured by the Galileo spacecraft

Space

The moon is 40 million years older than we thought it was

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Space

Slicing the moon in half would be disastrous for Earth – but beautiful

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Space

How asteroids can help us understand our place in the cosmos

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A solar flare, a tremendous explosion on the sun that happens when energy stored in

Space

Largest known solar storm struck Earth 14,300 years ago

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This image of the solar corona is a color overlay of the emission from highly ionized iron lines, with white light images added below. Different colors provide unique information about the temperature and composition of solar material in the corona. Credits: S. Habbal/M. Druckm?ller/Nasa https://www.nasa.gov/sites/default/files/thumbnails/image/fe_xi_fe_xiv_wl-hr_mitchell_achf.png

Space

Why the next solar eclipses are a unique chance to understand the sun

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W3TAKD Marijuana effects on the brain and cannabis mood altering chemicals or psychology and drugs concept in a 3D illustration style.

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How we get high: Unlocking the secrets of the endocannabinoid system

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Space

OSIRIS-REx is about to fling samples of the asteroid Bennu at Earth

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Europa (foreground), with Jupiter (right) and Io (middle)

Space

Europa’s underground ocean seems to have the carbon necessary for life

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Artist's concept of Makemake

Space

Eris and Makemake might be hiding unexpected oceans of liquid water

Dwarf planets aren’t expected to carry liquid water, but hints of surprising geological activity spotted with JWST indicate that some of them might have buried oceans

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Vaccine that erases immune memory may help treat multiple sclerosis

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Key immune cells may help protect against inflammatory bowel disease

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Space

Could we tweak the solar system to make Pluto a planet again?

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Environment

Can massive solar power expansion regenerate the US’s iconic prairies?

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