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It’s Tuesday, October 8 — here’s what you’ll find in today’s newsletter:

• SCOTUS hearing arguments about ghost guns

• A newly observed jellyfish behavior

• 4 quick hits of news from the last 24 hours

SCOTUS and ghost guns

CBS News: The Supreme Court is currently weighing the merits of Biden’s ban on “ghost gun” kits -- which are untraceable firearms that are made from kits or 3D printers. The court is deciding whether the Bureau of ATF overstepped in its authority to regulate ghost guns.

The ruling in the case hinges on whether the firearm kits can be classified as guns. ABC says classifying gun kits as firearms is crucial for tackling rising crime tied to ghost gun use.

According to KBIA, the Biden admin agrees, arguing the regulation of ghost guns is necessary -- they pose modern-day challenges reminiscent of past mail-order firearms.

On the other hand, NBC News says challengers question the ATF’s authority in the realm of ghost guns -- and slam the ban as Congressional overreach, emphasizing the importance of DIY gun owners' rights.

Jellyfish merging

Livescience.com: Deep-sea comb jellies have a really cool behavior -- when two are injured, they can actually fuse into single entity with joint nervous systems!

Regentstudies.com says this is new knowledge for us -- Remote-controlled voyages reveal these stunning behaviors, thanks to cutting-edge ROVs.

Gigazine.net notes that it's the first known instance of such behavior in any animal -- other two-headed animals can exist, but that's only because of birth defects.

The Independent is excited -- this rare merging might open doors to fresh insights on regeneration! Maybe it's due to the extreme environment of the deep sea?

1) TikTok faces lawsuits from 14 states accusing it of harming children's mental health and violating privacy laws.

2) A significant wave of departures hits NYC's City Hall, including the top deputy mayor amid a federal probe.

3) China's anticipated stock rally ends abruptly as stimulus measures disappoint, leading to significant market drops.

4) Kamala Harris' lead over Donald Trump narrows to just three points, indicating a tight race ahead.