Arachnids
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![We see a black funnel web spider with a red mark on its underside. It's on the brown dirt and its four front legs are raised, showing its fangs.](https://cdn.mos.cms.futurecdn.net/kawCJ4SbMujvtq9kpefird-320-80.jpg)
What is the deadliest spider in the world?
By Joshua A. Krisch published
Although nearly all spiders are venomous, a few stand out from the crowd for their potent toxins. So, which spider is the deadliest in the world?
![A jumping spider sits on a leaf.](https://cdn.mos.cms.futurecdn.net/NPAwExBzSyqFmEWz2pAbBK-320-80.jpg)
Bold jumping spiders can literally go blind with hunger
By Jennifer Nalewicki published
Researchers have found that undernourished bold jumping spiders begin to lose light-sensitive photoreceptors.
![A funnel weaving spider surrounded by its web.](https://cdn.mos.cms.futurecdn.net/Y4qtdFsKrPbnE64EpR4mkC-320-80.jpg)
Female spiders play dead during sex so males don't have to worry about being eaten
By Harry Baker published
Researchers have determined the cause of an unusual behavior in funnel weaving spiders that involves the females curling up as if they're dead before having sex.
![We see a Sydney-funnel web spider (Atrax robustus) preparing to strike. It has a red abdomen and black legs and fangs.It's on a green leaf.](https://cdn.mos.cms.futurecdn.net/kF5jp3XCQPVktT36PJFaMi-320-80.jpg)
Deadly spiders that can kill in minutes and survive underwater are hiding out in swimming pools
By Hannah Osborne published
Heavy rain in Australia has led to an influx in venomous spiders being washed into people's swimming pools. Species found include funnel-web spiders, the venom of which is so toxic it can kill a child in just 15 minutes.
![Brown widow spiders (Latrodectus geometricus) have caused population declines among several black widow species in the U.S.](https://cdn.mos.cms.futurecdn.net/Hiih3ptKxBBWv6HwXmvzb4-320-80.jpg)
Black widows are being slaughtered by their brown widow cousins, and we don't know why
By Harry Baker published
Brown widow spiders, which are invasive to North America, are wiping out black widow populations in the U.S. by aggressively attacking them for no clear reason, a new study shows.
![A close-up of a yellow sea spider.](https://cdn.mos.cms.futurecdn.net/q9fNP4S2AxZDtEuea3nBSF-320-80.jpg)
Sea spiders can regrow their anuses, scientists discover
By Harry Baker published
In a new study, some juvenile sea spiders were able to regrow amputated body parts, which was previously assumed to be impossible in these marine arthropods.
![Brown Recluse Spider](https://cdn.mos.cms.futurecdn.net/rAcbdWRqm4EJ2ZoMwffANo-320-80.jpg)
Brown recluse bites caused two people's blood cells to self-destruct
By Rebecca Sohn published
Bites from brown recluse spiders can cause an autoimmune form of hemolytic anemia, in which red blood cells are destroyed by the immune system.
![A black widow spider spinning egg case silk.](https://cdn.mos.cms.futurecdn.net/fc24GodDoufG5kgRPici3N-320-80.jpg)
11 deadliest spiders
By Christina Hughes published
From the funnel web spider to the brown recluse, here are some of the deadliest spiders on Earth.
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