We prove that if κ is an uncountable regular cardinal and a compact T2 space X contains a free sequence of length κ, then X also contains such a sequence that is convergent. This implies that under CH ...

During development, embryonic cells sculpt three-dimensional tissues. Although cell polarity is commonly analysed along one, and sometimes two, dimensions, this perspective illustrates how ...

The transition from aquatic to terrestrial life has been one of the most significant evolutionary challenges. This decisive process in the evolution ...

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Different species of spiders produce different silks that serve different purposes, from floating on air to cradling eggs.

Sea snakes have dramatically reconfigured their sense of smell for underwater life. Researchers found their airborne scent ...

When we first saw [DiPDoT’s] homebrew computer, we thought it was an Altair 8800. But, no. While it has a very familiar front panel, the working parts are all based on relays. While it isn’t finished, ...

Automated email sequences are sent to users after they take specific actions, such as signing up for an email newsletter or completing a purchase. These perfectly timed and crafted emails may seem ...