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Excel's Custom Data Validation: A Trick You Didn't Know You Needed

If you've used data validation in Excel before, you probably selected the relevant cells, clicked "Data Validation" in the ...

The Juno–Izumo catch bond: How the egg cell and sperm hold together so tightly

Once a sperm has broken through to an egg cell in order to fertilize it, the two cells need to hold together tightly. This ...