Scientists have figured out why Martian soil is so crusty
On November 26, 2018, NASA's Interior Exploration using Seismic Investigations, Geodesy, and Heat Transport (InSight) mission ...
来自MSN1 年
Skin cancer warning signs and how to spot 'red flag' symptoms, according to medical experts
A lump on the skin may: Be firm and pink Have a hard, crusty surface Bleed easily Be tender to touch Develop into an ulcer There's a very small risk of squamous cell carcinoma spreading to other ...