Natural (born) killers: What do they really do?

Our immune systems contain three fundamentally different types of cell: B-cells, T-cells and the mysteriously named Natural Killer cells (NK cells), which are known to be involved in killing tumour cells and other infected cells. Experiments to investigate the...

How nature’s patterns form

When people on airplanes ask Alan Newell what he works on, he tells them “flower arrangements.” He could also say “fingerprints” or “sand ripples” or “how plants grow.” “Most patterns you see, including the ones on...

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