Create Your Own Sand Timer: the DIY sand timer allows you to customize your own hourglass with the colored sand provided, and the 4 tubes of colored sand are in dark blue, light blue, light gray ...

STURDY AND STABLE - These solid glass sand timers are built to last, and with the bonus beech wood stands with soft felt bases, your hourglasses will remain stable and protected even when you're ...

Black widows’ red hourglass tells birds to back off but is almost invisible to insects. Jason Bazzano / Alamy Stock Photo If your PhD adviser suggests that you spend more time with a creature ...

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