Daily briefing: Baby T. rex were tiny but deadly

TL;DR - This Nature daily briefing highlights research on juvenile T. rex, genetic clues for borderline personality disorder and cancer-associated wasting. The supplied excerpt does not provide methods or detailed findings.

• Juvenile T. rex are characterized as small but still dangerous.
• Research offers initial genetic clues related to borderline personality disorder.
• Another study advances understanding of wasting associated with cancer.
• The excerpt does not quantify results or explain the underlying mechanisms.