Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Bohrium
Table title:
Isotopes
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Isotope </th><th colspan=1 rowspan=1 > Half-life </th><th colspan=1 rowspan=1 > Decay mode </th><th colspan=1 rowspan=1 > Discovery year </th><th colspan=1 rowspan=1 > Reaction </th></tr>
<tr> <td colspan=1 rowspan=1 > 260Bh </td><td colspan=1 rowspan=1 > 35 ms </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2007 </td><td colspan=1 rowspan=1 > 209Bi(52Cr,n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 261Bh </td><td colspan=1 rowspan=1 > 11.8 ms </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 1986 </td><td colspan=1 rowspan=1 > 209Bi(54Cr,2n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 262Bh </td><td colspan=1 rowspan=1 > 84 ms </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 1981 </td><td colspan=1 rowspan=1 > 209Bi(54Cr,n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 262mBh </td><td colspan=1 rowspan=1 > 9.6 ms </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 1981 </td><td colspan=1 rowspan=1 > 209Bi(54Cr,n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 264Bh </td><td colspan=1 rowspan=1 > 0.97 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 1994 </td><td colspan=1 rowspan=1 > 272Rg(—,2α) </td></tr>
<tr> <td colspan=1 rowspan=1 > 265Bh </td><td colspan=1 rowspan=1 > 0.9 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2004 </td><td colspan=1 rowspan=1 > 243Am(26Mg,4n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 266Bh </td><td colspan=1 rowspan=1 > 0.9 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2000 </td><td colspan=1 rowspan=1 > 249Bk(22Ne,5n) </td></tr>
<tr> <td colspan=1 rowspan=1 > 267Bh </td><td colspan=1 rowspan=1 > 17 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2000 </td><td colspan=1 rowspan=1 > 249Bk(22Ne,4n) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 270Bh </td><td class="highlighted"  colspan=1 rowspan=1 > 61 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2006 </td><td colspan=1 rowspan=1 > 282Nh(—,3α) </td></tr>
<tr> <td colspan=1 rowspan=1 > 271Bh </td><td colspan=1 rowspan=1 > 1.2 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2003 </td><td colspan=1 rowspan=1 > 287Mc(—,4α) </td></tr>
<tr> <td colspan=1 rowspan=1 > 272Bh </td><td colspan=1 rowspan=1 > 9.8 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2005 </td><td colspan=1 rowspan=1 > 288Mc(—,4α) </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > 274Bh </td><td class="highlighted"  colspan=1 rowspan=1 > 40 s </td><td colspan=1 rowspan=1 > α </td><td colspan=1 rowspan=1 > 2009 </td><td colspan=1 rowspan=1 > 294Ts(—,5α) </td></tr>
<tr> <td colspan=1 rowspan=1 > 278Bh </td><td colspan=1 rowspan=1 > 11.5 min? </td><td colspan=1 rowspan=1 > SF </td><td colspan=1 rowspan=1 > 1998? </td><td colspan=1 rowspan=1 > 290Fl(e−,νe3α)? </td></tr>
</table>
Question:
What are the half-lives of the Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh?
Answer:
The Bohrium isotopes ²⁷⁰Bh and ²⁷⁴Bh have an half-lives of about 61 s and 40 s.