Black poop, or melena, can happen when there is bleeding in the upper digestive tract, such as the stomach or esophagus. As the blood moves through the intestines, it turns dark, making stool appear ...

Feb. 19, 2025 — Within the Dark Energy Spectroscopic Instrument's early data, scientists have uncovered the largest samples ever of intermediate-mass black holes and dwarf galaxies hosting an ...

White T-shirts get a lot of attention, but let’s not forget their equally versatile counterpart: the exceedingly wearable, deceptively simple black T-shirt. It’s a staple you can wear to work ...

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As the writer behind this guide to the best white sneakers, it’s fascinating to see what the sneakerheads are chasing — from Air Force 1s to Stan Smiths. There’s a style for everyone these ...

White arrows indicate eye spots as morphological head marker ... H) C59 quantification by mass spectrometry with sub-micromolar sensitivity. Titration curve, obtained by adding C59 standard to ...

Immune cells called natural killer cells can target and eliminate tumours. The gene expression and spatial distribution of the immune cells in the tumour microenvironment indicates whether liver ...