Mr scientist

Scientists put a human brain gene called *NOVA1* into mice using genetic engineering. They found that these mice had slightly different brains—with better connections between brain cells—and were smarter at learning new tasks. The mice also made different sounds, but they couldn’t talk like humans.

This study shows that small changes in genes can affect how brains develop and work. It helps us understand how human brains evolved to be so advanced. The research might also help scientists study brain disorders like autism.

But human intelligence is very complex, so this is just one small part of the story. Also, changing animal genes with human DNA raises ethical questions. Next, scientists will study other genes to learn more about how our brains work.

In simple terms: A human gene made mice brains work a little more like ours, giving clues about how humans became so smart.

**Scientists in Japan Create Medicine to Grow New Teeth**

A team in Japan, led by Dr. Katsu Takahashi, is working on a special drug that could help people regrow lost teeth. Normally, humans get only two sets of teeth (baby teeth and adult teeth), but scientists found that we actually have a hidden third set that never grows.

They discovered a protein called **USAG-1** that stops these extra teeth from forming. By blocking this protein with a new drug, they successfully made mice and ferrets grow new teeth. Now, they’re testing it on humans.

# # # **How It Started:**
- In 2005, scientists noticed that mice without USAG-1 grew extra teeth.
- After years of research, they developed a drug to block USAG-1 in humans.

# # # **What’s Next?**
- **2024:** Testing on adults who lost their back teeth (molars).
- **2025:** Testing on children born with missing teeth.
- If successful, the treatment could be available by **2030**, costing around **$9,800**.

# # # **Challenges Left:**
- Making sure the new teeth grow correctly.
- Checking if the effect lasts long-term.

If this works, it could replace dentures and implants, giving people natural teeth again! 🚀🦷

*(Simplified from the original post by Dr. Suhail Jeelani.)*